@article{2-s2.0-85124290568,

title = {Evaluation of Destress Blasting Effectiveness Using the Seismic Moment Tensor Inversion and Seismic Effect Methods},

author = { Ł. Wojtecki and P. Konicek and M.J. Mendecki and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124290568&doi=10.1061%2f%28ASCE%29GM.1943-5622.0002314&partnerID=40&md5=2ae6bce6d942e144ed22f639240d5942},

doi = {10.1061/(ASCE)GM.1943-5622.0002314},

issn = {15323641},

year  = {2022},

date = {2022-01-01},

journal = {International Journal of Geomechanics},

volume = {22},

number = {4},

publisher = {American Society of Civil Engineers (ASCE)},

abstract = {The effectiveness evaluation of long-hole destress blasting in an underground hard coal mine was made via the seismic effect method and the seismic moment tensor inversion. The seismic effect method is based on the difference between seismic and explosive energies, indicating that additional processes appeared to change the stress state in the rock mass, however, the seismic effect does not consider the focal mechanism. Therefore, the seismic moment tensor inversion was applied. Tremors that were an effect of long-hole destress blasting during the extraction of coal seam No. 507 in one of the hard coal mines localized in the Polish part of the Upper Silesian Coal Basin were analyzed. The results of the preceding applied methods were compared. High values of seismic effect indicate stress relaxation and thus the occurrence of additional processes, leading to a new stress equilibrium state in the rock mass. It has been shown that in analyzed cases, achieving such a state corresponded to the presence of a nonexplosive mechanism, with a large share or domination of the double couple component in the full seismic moment tensor solution. The reverse slip mechanism was present in the foci of provoked tremors, which can be associated with the displacement of rock blocks under conditions of high horizontal stress. Convergent results of the methods used confirm that the appropriate design of blasting parameters in relation to specific geological and mining conditions make it possible to provoke additional geomechanical processes in the rock mass. © 2022 American Society of Civil Engineers.},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85117771070,

title = {Quaternary faulting in the Western Carpathians: Insights into paleoseismology from cave deformations and damaged speleothems (Demänová Cave System, Low Tatra Mts)},

author = { J. Szczygieł and M. Gradziński and P. Bella and H. Hercman and J. Littva and M.J. Mendecki and P. Sala and W. Wróblewski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117771070&doi=10.1016%2fj.tecto.2021.229111&partnerID=40&md5=89ec67e80e6e233668d6712edc6052b2},

doi = {10.1016/j.tecto.2021.229111},

issn = {00401951},

year  = {2021},

date = {2021-01-01},

journal = {Tectonophysics},

volume = {820},

publisher = {Elsevier B.V.},

abstract = {Multiphase cave conduit offset and related speleothem damage in the Demänová Cave System (DCS; the Low Tatra Mts; Central Western Carpathians) were dated with U-series methods, revealing five events: (1) 570 (442)–417 ka, (2) 306–291 ka, (3) 184–130 ka, (4) ~19 ka, and (5) 2.56–2.3 ka. To decipher the cause of the damage, we combined geochronological data with structural, geomorphological, and seismological research. Gravity sliding as a probable source of damage is unlikely since the Demänová Valley has deepened only to a small extent for the past 550 ka and the steep fissure guiding the studied parts of the DCS extends below the recent valley. However, coseismic block sliding cannot be unambiguously excluded, as Newmark displacement analysis revealed that any >M7 earthquake in the 25 km range could have produced a 10-cm pseudostatic displacement. The studied offsets were accompanied by shaking, as inferred from fallen stalagmites and stalactites; hence, distant earthquakes are plausible damage sources. We applied ground-motion models and compared them with seismicity and scant prehistoric and historical data to identify and quantify the probable seismic source, which is most likely the Sub-Tatric Fault located 17.5 km from the cave. As inferred from the applied ground-motion models, a > M7 event on the Sub-Tatric Fault would generate a PGA >4 m/s2 in the cave despite the attenuation, which is above the threshold horizontal ground acceleration forcing the majority of speleothems to break. Although the mechanism that leads to cave passage offsets remains unclear we consider them as an off-fault damage caused by secondary faulting related to postseismic surface vertical movements, or less likely but not out of the realm of possibility distributed rupturing. © 2021 Elsevier B.V.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85099453580,

title = {A rare signature of subglacial outburst floods developed along structural ice weaknesses in the southern sector of the Scandinavian Ice Sheet during the Drenthian Glaciation, S Poland},

author = { T. Salamon and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099453580&doi=10.1016%2fj.geomorph.2021.107593&partnerID=40&md5=46fd92a5fddab5240fca7d3b35f38b5c},

doi = {10.1016/j.geomorph.2021.107593},

issn = {0169555X},

year  = {2021},

date = {2021-01-01},

journal = {Geomorphology},

volume = {378},

publisher = {Elsevier B.V.},

abstract = {We present the study of a subglacial drainage system that developed in the base of the Scandinavian Ice Sheet at the border of the Silesian Lowland and Silesian Upland (southern Poland) during the Drenthian Glaciation as a result of large outburst flood events. This drainage system was characterised by a spatially complex structure, i.e. it was composed of an individual an N-channel (tunnel channel) incised in Mesozoic rocks, i.e. Cretaceous and Triassic marls and limestones, and an R-channel, deposits of which form a set of large esker ridges which also occur on bedrock in the SE prolongation of the tunnel channel. Unlike most known cases of the co-occurrence of such forms, the studied tunnel channel and eskers are directly related, having been formed during the same flow events. The studied forms are unique within the entire southern sector of the Scandinavian Ice Sheet, which, in Central Europe, advanced mainly over soft unconsolidated Quaternary and Neogene sediments. The tunnel channel was formed as a result of enormous erosion of the ice sheet bed. The material eroded from the channel was partially deposited in a subsequent part of the drainage system. The location and orientation of the drainage system did not result directly from water pressure gradients, but was strongly determined by the internal structure of the ice sheet, i.e. it presumably developed along the marginal part of the ice stream supplying the Upper Odra ice lobe, which represented distinct weaknesses within the ice sheet. The development of the drainage system was the effect of the drainage of meltwater stored in the ice sheet system, most probably as a supraglacial lake. Gravelly-sandy rhythms recorded within the esker succession indicate that the process of lake drainage took place in several stages, or that the lake developed and drained several times. © 2021 Elsevier B.V.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85101233095,

title = {Damaged Speleothems and Collapsed Karst Chambers Indicate Paleoseismicity of the NE Bohemian Massif (Niedźwiedzia Cave, Poland)},

author = { J. Szczygieł and A. Sobczyk and H. Hercman and M.J. Mendecki and M. Gąsiorowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101233095&doi=10.1029%2f2020TC006459&partnerID=40&md5=c0f692c911f7afabc1dae9ea87da1094},

doi = {10.1029/2020TC006459},

issn = {02787407},

year  = {2021},

date = {2021-01-01},

journal = {Tectonics},

volume = {40},

number = {3},

publisher = {Blackwell Publishing Ltd},

abstract = {Multiphase speleothem damage and passage collapse in Niedźwiedzia Cave (NE Bohemian Massif; Poland) were dated with U-series methods, revealing five events: (1) 320–306 ka, (2) 253–236 ka, (3) 162–158 ka, (4) 132–135 ka, and (5) >21 ka. Events 1, 3 and 4 are robustly constrained, and events 2 and 5 are less certain. Although we cannot unambiguously exclude other agents (frost or gravity collapses), the most likely trigger of damage in the cave was an earthquake, which is supported by timing (the damage occurred independently from climatic conditions in cold and warm periods) and deformation style (damage to the ceiling and walls as well as the passage floor). We applied ground motion models to determine the probable seismic source size, which is most likely the Sudetic Marginal Fault - one of the most pronounced tectonic structures in Central Europe. Located <20 km from the cave and with documented earthquakes of M > 6, the Sudetic Marginal Fault can produce peak ground acceleration values high enough to break speleothems. The other plausible seismic sources are faults in the Upper Nysa Kłodzka Graben located to the east and the Trzebieszowice-Biela Fault. Although there are sparse historical data that would allow estimating linked seismic hazards, the <8 km distance between the cave and faults should suffice to destroy the speleothems. Niedźwiedzia Cave shielded environmental earthquake effects from erosion. This study shows the advantage of employing speleoseismology in moderate seismic regions, where earthquake effects are rarely preserved in the geological record. © 2021. The Authors.},

note = {10},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85098121438,

title = {Spatiotemporal analysis of elastic and inelastic deformations in roof-rocks from seismological observations},

author = { M.J. Mendecki and R. Pakosz and Ł. Wojtecki and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098121438&doi=10.1016%2fj.ijmst.2020.12.001&partnerID=40&md5=6f84bbdcca0ef5031d59aced0387b75d},

doi = {10.1016/j.ijmst.2020.12.001},

issn = {20952686},

year  = {2021},

date = {2021-01-01},

journal = {International Journal of Mining Science and Technology},

volume = {31},

number = {2},

pages = {241-251},

publisher = {China University of Mining and Technology},

abstract = {The spatiotemporal analysis of seismic zones characterised by the scattering and accumulation of strain energy in the roof-rocks of the excavated longwall panel where inelastic or elastic deformations occurred during hard coal seam mining is discussed. The studied longwall panel was designed to utilize the effect of partial stress relaxation caused by the earlier extraction of the coal seams located above. A full seismic moment tensor and spectral source parameter analyses were used to obtain information about the degree of inelastic and elastic coseismic deformations. This study also showed that these deformation changes correspond to variation in the Benioff strain release characteristics. Next, analyses of deformation zones were compared with the relationship between radiated energy and the excavated volume of rocks per month. The concept of balanced seismic energy release assumed the exponential increase of released seismic energy with the increase in the volume of excavated rock. Discrepancies between the observed and predicted radiated energies indicated that strain energy in selected zones in the rock mass was either scattered if the prediction was overestimated, or accumulated if underestimated. Moreover, the study showed that elastic deformation in one zone can lead to inelastic deformation in the same zone. © 2021},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85099881178,

title = {Ground-motion prediction models evoked by seismicity in the Upper Silesia Coal Basin, Poland, the review with case studies},

author = { M.J. Mendecki and J. Odrobińska and R. Patyńśka and A.F. Idziak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099881178&doi=10.1093%2fgji%2fggaa525&partnerID=40&md5=36df518f79880af582419d69d0e57b93},

doi = {10.1093/gji/ggaa525},

issn = {0956540X},

year  = {2021},

date = {2021-01-01},

journal = {Geophysical Journal International},

volume = {224},

number = {2},

pages = {1381-1403},

publisher = {Oxford University Press},

abstract = {This paper presents the results of new research on ground-motion relations from three areas in the Upper Silesia Coal Basin (USCB) in Poland and compares them with of ground-motion relations. These three mining areas of the USCB were investigated in order to better predict ground motion caused by seismic events. The study focused on variations in regression parameters and predicted PGA (peak ground acceleration) for different areas to better understand the influence of geology. To compare our results to previous models we had to unify the known ground-motion prediction equations (GMPE). Then, we used various regression models to predict the corresponding PGA values of a relatively strong USCB seismic event with an energy level of 108 J (ML = 3.3) and compared their results. The regression model parameters were compared to each other, particularly those related to energy and distance, which corresponds to a geometrical scattering (attenuation) of seismic waves as well as the influence of wave type (body or surface). Finally, building upon several established regression models, our analysis showed a strong linear correlation between two regression parameters corresponding to energy and distance. However, an open question remains whether this relation can be explained by physics, or, from a mathematical point of view, it is the effect of linear dependence of matrix vectors logE and logR. A comparison of different GMPEs allows for better verification of knowledge about the impact of tremors on ground motion in the USCB. © 2020 The Author(s). Published by Oxford University Press on behalf of The Royal Astronomical Society.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85092601005,

title = {The influence of distant coal seam edges on seismic hazard during longwall mining},

author = { Ł. Wojtecki and I. Gołda and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85092601005&doi=10.1007%2fs10950-020-09959-8&partnerID=40&md5=5295f222db1ab3e1d7c4ef3e69b14798},

doi = {10.1007/s10950-020-09959-8},

issn = {13834649},

year  = {2021},

date = {2021-01-01},

journal = {Journal of Seismology},

volume = {25},

number = {1},

pages = {283-299},

publisher = {Springer Science and Business Media B.V.},

abstract = {Underground coal seam mining has been carried out in the Upper Silesian Coal Basin, Poland, for many years and with a simultaneous increase in exploitation depth. Frequently, coal seams are not fully extracted due to numerous reasons which lead to their edges and remnants remaining in the rock mass. Even in the case of the full extraction of a coal seam, mining usually ends at the border of a protecting pillar to protect underground or surface objects, sometimes at the border of the mining area, or some distance from the old goaf or high throw fault. Extraction of subsequent coal seams in an analogous range results in a cluster of coal seam edges remaining. In the vicinity of the mentioned remainders, the disrupted stress distribution is expected. The infraction of the aforementioned equilibrium repeatedly results in the occurrence of strong mining tremors. The observations from the studied coal seam no. 408’s longwall panel indicated that mining works are able to disturb the present stress-strain equilibrium in the area of the edges of other coal seams, even if they are located at a greater vertical distance away. The seismological parameters and distributions have been applied for this purpose. © 2020, The Author(s).},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85122101488,

title = {ROTATIONAL-TRANSLATIONAL SCALING RELATIONS FROM INDUCED SEISMIC EVENTS – COMPARISON BEFORE AND AFTER AMPLIFICATION CORRECTION [ROTAČNĚ-TRANSLAČNÍ ŠKÁLOVACÍ VZTAHY INDUKOVANÝCH SEISMICKÝCH UDÁLOSTÍ – POROVNÁNÍ PŘED A PO KOREKCI ZESÍLENÍ]},

author = { D. Nawrocki and M.J. Mendecki and L. Teper},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122101488&doi=10.26345%2fegrse-018-21-202&partnerID=40&md5=8a297a51bb74333cfa3cbda4dfbd59a1},

doi = {10.26345/egrse-018-21-202},

issn = {18031447},

year  = {2021},

date = {2021-01-01},

journal = {International Journal of Exploration Geophysics, Remote Sensing and Environment},

volume = {28},

number = {2},

pages = {18-28},

publisher = {CAAG - Czech Association of Geophysicists},

abstract = {The rotational and translational signals were registered at the Planetarium (“PLA”) station due to mining exploration, localized in the central part of the Upper Silesian Coal Basin. Visual inspection of the data peak values showed that the scaling relation between peak rotational velocity PRV and peak ground acceleration PGA could be expressed by mathematical relation of a power function. Signals were analyzed using the horizontal-to-vertical spectral ratio (HVSR) method, which leads to estimate resonance frequency and amplification level. Estimated amplification factor leads to estimate next regression models of scaling relation, similar expressed by power and linear functions. Comparison of the estimated function coefficients for raw data and data corrected by the amplification factor showed differences in their values which can be considered as proof of impact of the site effect on rotational motion. © 2021, CAAG - Czech Association of Geophysicists. All rights reserved.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85093931400,

title = {The Seismic Source Parameters of Tremors Provoked by Long-Hole Destress Blasting Executed During the Longwall Mining of a Coal Seam Under Variable Stress Conditions},

author = { Ł. Wojtecki and M.J. Mendecki and I. Gołda and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093931400&doi=10.1007%2fs00024-020-02603-z&partnerID=40&md5=b171ed560a0b1a089a9d332bdc2a96c3},

doi = {10.1007/s00024-020-02603-z},

issn = {00334553},

year  = {2020},

date = {2020-01-01},

journal = {Pure and Applied Geophysics},

volume = {177},

number = {12},

pages = {5723-5739},

publisher = {Birkhauser},

abstract = {The underground mining of coal seams in the Upper Silesian Coal Basin is carried out at great depths and mostly in the presence of remnants or edges of other surrounding coal seams, i.e. under the condition of high stress level in the rock mass. Therefore, this mining is accompanied by rockburst hazard and suitable preventive action is required. Long-hole destress blasting plays an important role and is commonly applied in rockburst prevention in underground hard coal mines. Estimated blasting effectiveness is important when designing rockburst prevention. It is commonly estimated on the basis of the seismic energy of a provoked tremor. The seismic source parameters have already been considered for this purpose. Additional information about the effects of long-hole destress blasting could be contemplated in the planning of active rockburst prevention. The seismic source parameters of tremors provoked by long-hole destress blasting have been calculated and are presented in this article. Destress blasts were performed during the longwall mining of coal seam no. 506 in one of the hard coal mines in the Upper Silesian Coal Basin. They were executed from the longwall face, in order to destress the rock mass ahead of it. Parameters of the blasts were variable and they were modified according to geological and mining conditions and the observed level of rockburst hazard. The seismic source parameters have been determined for tremors provoked directly after firing explosives and for tremors occurring in the waiting time, and they have been compared with each other. © 2020, The Author(s).},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85090228480,

title = {Soft-sediment deformation structures in cave deposits and their possible causes (Kalacka Cave, Tatra Mts., Poland)},

author = { J. Szczygieł and W. Wróblewski and M.J. Mendecki and H. Hercman and P. Bosák},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85090228480&doi=10.1016%2fj.jsg.2020.104161&partnerID=40&md5=b3d3d4bef9a3e979c5dc0a32234dac40},

doi = {10.1016/j.jsg.2020.104161},

issn = {01918141},

year  = {2020},

date = {2020-01-01},

journal = {Journal of Structural Geology},

volume = {140},

publisher = {Elsevier Ltd},

abstract = {Clastic deposits in Kalacka Cave in the Tatra Mts. Show soft-sediment deformation structures (SSDS) rare for a cave environments. The poorly sorted allochthonous sediments were deposited within a cave sump under a fluvial regime, likely due to glacially initiated back-flooding during the Last Glacial. The structures include small-scale faults (normal and reverse), folds (upright symmetric anticlines; low-amplitude open folds; W-vergent folds and fault-propagation folds), and water-escape structures. A laboratory experiment is used to assess the possibile liquefaction of a thin soft-sediment filling in a limestone tube, including calculation of the site effects of resonance frequency and amplification coefficient and the site vulnerability index Kg. The calculations indicate that seismic waves can be amplified up to 10 times and the expected resonance frequency is ~17.05 Hz. We argue that the observed SSDS formed in two stages. First, brittle and ductile deformation structures developed due to gravity-induced slumping. Next, liquefaction produced water-escape structures. The studied SSDS were likely seismically triggered. Favorable conditions occurred during the withdrawal of the last glacier (MIS 2) when the sediments were oversaturated and the Tatra Mts. experienced a strong earthquake (M7.0). Alternatively, high-frequency microearthquakes could have been triggered by slope failure cutting into Kalacka Cave. © 2020 Elsevier Ltd},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85086733900,

title = {Mining-triggered seismicity governed by a fold hinge zone: The Upper Silesian Coal Basin, Poland},

author = { M.J. Mendecki and J. Szczygieł and G. Lizurek and L. Teper},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086733900&doi=10.1016%2fj.enggeo.2020.105728&partnerID=40&md5=6d431788f251ef168e1576565724ce95},

doi = {10.1016/j.enggeo.2020.105728},

issn = {00137952},

year  = {2020},

date = {2020-01-01},

journal = {Engineering Geology},

volume = {274},

publisher = {Elsevier B.V.},

abstract = {Mining tremor mechanisms and principal stress directions were analysed in order to compare characteristics of seismic events and stress regimes with tectonic settings in the Bytom Syncline, located in the Upper Silesian Coal Basin. The results of seismic moment tensor inversion calculated for 41 events with magnitudes > M2.0 were used to trace changes in types of mechanism (normal; strike-slip; reverse) with the progress of mining from Panel 3, coal seam 503, Bobrek Mine. The data was sourced from the IS-EPOS Platform, an open data infrastructure for the study of anthropogenic hazards linked to georesource exploitation. The foci were located below the seam and followed a longwall excavation. The computed mechanisms and distribution of spatial-temporal events enabled three clusters representing three different stages of stress regimes to be distinguished. The calculated principal stress axes indicated the main stress directions present in the studied area, enabling a local model of the derivative pattern of neotectonic deformation to be described. The regime changed from horizontal extension in the syncline limb (first cluster) to transpression (second cluster) to dominating compression in the hinge (third cluster), resulting in reverse fault production. Finally, the results revealed the causes of seismicity in the studied area and showed that the studied events had been mostly triggered. © 2020 Elsevier B.V.},

note = {8},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85086904396,

title = {Geophysical and petrological studies of the former lead smelting waste dump in Sławków, Poland},

author = { M.J. Mendecki and R. Warchulski and M. Szczuka and D. Środek and J. Pierwoła},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086904396&doi=10.1016%2fj.jappgeo.2020.104080&partnerID=40&md5=8df2f22f0c5fcc6ef471881c79ab1364},

doi = {10.1016/j.jappgeo.2020.104080},

issn = {09269851},

year  = {2020},

date = {2020-01-01},

journal = {Journal of Applied Geophysics},

volume = {179},

publisher = {Elsevier B.V.},

abstract = {The city of Sławków has witnessed the metallurgical industry from the Middle Ages to modern times. The lead smelting causes usually contamination by a slag waste dump, threatening the environment of the vicinity of the cities. Similar industry existed in many places around the world but, so far, no geophysical work has ever been reported to deal with this problem. In this paper, we present the results of the electromagnetic (EM) and electrical resistivity tomography (ERT) measurements, and petrological (XRD; EPMA; SEM-EDS) tests in order to identify the extent of the slag waste dump and pollution leaching. The geophysical method allowed to identify the spatial distribution, ERT – depths, whereas EM – lateral distribution. Moreover, these studies provide information about the electrical properties of the slags, i.e. conductivity and in-phase component. The field surveys were supplemented by petrological analyses using EPMA, SEM-EDS and XRD. These allowed to determine the phase composition and chemistry of the slag. Together with EM and ERT measurements, it allowed to illustrate the lack of pollution transfer to soils caused by the slag presence in the studied area. © 2020},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85079250121,

title = {Geophysical Evaluation of Effectiveness of Blasting for Roof Caving During Longwall Mining of Coal Seam},

author = { Ł. Wojtecki and P. Konicek and M.J. Mendecki and I. Gołda and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85079250121&doi=10.1007%2fs00024-019-02321-1&partnerID=40&md5=89356192373c323287f035bc0606c806},

doi = {10.1007/s00024-019-02321-1},

issn = {00334553},

year  = {2020},

date = {2020-01-01},

journal = {Pure and Applied Geophysics},

volume = {177},

number = {2},

pages = {905-917},

publisher = {Birkhauser},

abstract = {Deep longwall mining of coal seams is made in the Upper Silesian Coal Basin (USCB) under complicated and mostly unfavourable geological and mining conditions. Usually, it is correlated with rockburst hazard mostly at a high level. One of the geological factors affecting the state of rockburst hazard is the presence of competent rocks in the roof of extracted coal seams, so rock falling behind the longwall face does not occur, and hanging-up of roof rocks remains. The long-lasting absence of caving may lead to an occurrence of high-energy tremor in the vicinity of the longwall face. Roof caving behind the longwall face may be forced by blasting. The column of explosives is then located in blastholes drilled in layers of roof rocks, e.g. sandstones behind the longwall face. In this article, a characterization of tremors initiated by blasts for roof caving during underground extraction of coal seam no. 507 in one of the collieries in the USCB has been made using three independent methods. By the basic seismic effect method, the effectiveness of blasting is evaluated according to the seismic energy of incited tremors and mass of explosives used. According to this method, selected blasts gave extremely good or excellent effect. An inversion of the seismic moment tensor enables determining the processes happening in the source of tremors. In the foci of provoked tremors the slip mechanism dominated or was clearly distinguished. The expected explosion had lesser significance or was not present. By the seismic source parameters analysis, among other things, an estimation of the stress drop in the focus or its size may be determined. The stress drop in the foci of provoked tremors was in the order of 105 Pa and the source radius, according to the Brune’s model, varied from 44.3 to 64.5 m. The results of the three mentioned methods were compared with each other and observations in situ. In all cases the roof falling was forced. © 2019, The Author(s).},

note = {11},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85071262697,

title = {Rainwater-induced migration of potentially toxic elements from a Zn–Pb slag dump in Ruda Śląska in light of mineralogical, geochemical and geophysical investigations},

author = { R. Warchulski and M.J. Mendecki and A. Gawęda and M. Sołtysiak and M. Gadowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071262697&doi=10.1016%2fj.apgeochem.2019.104396&partnerID=40&md5=b22dcb6041800cf693d9fc9a4ebcdb5b},

doi = {10.1016/j.apgeochem.2019.104396},

issn = {08832927},

year  = {2019},

date = {2019-01-01},

journal = {Applied Geochemistry},

volume = {109},

publisher = {Elsevier Ltd},

abstract = {The Upper Silesia region of Poland is known for its concentration of heavy industry, including mining and smelting. Slag dumps scattered across the region are the sources of pollutants such as Zn, Mn, As, Cd and Pb. At the slag dump in Ruda Śląska, it is possible to distinguish three types of slag: (i) slag associated with the muffle/lining material, composed of olivine, pyroxene, iron oxide, feldspar and glass; (ii) glassy slag composed of glass and single crystals of melilite and wollastonite; and (iii) slag composed of aggregates of melilite, wollastonite and anorthite. These concentrate Potentially Toxic Elements (PTEs), reaching up to 6130 mg/kg of As, 36300 mg/kg of Mn, 21700 mg/kg of Pb, 53600 mg/kg of Zn and 105 mg/kg of Cd. Rainfall-induced weathering causes PTE mobilisation to secondary phases, mainly carbonates, sulphates, oxides and hydroxides. Leaching tests based on the Synthetic Precipitation Leaching Procedure (SPLP) prove the release of PTEs from slags and secondary phases, which was further confirmed by significant PTE concentrations in a water sample from effluent next to the dump: 2710 μg/l Mn, 163 μg/l Zn, 52.5 μg/l Pb, 20.1 μg/l As, 0.98 μg/l Cd. This study is the first attempt to apply a combination of electromagnetic (EM) measurements and mineralogical investigations to pyrometallurgical Zn–Pb slags, and to precisely describe links between the obtained conductivity and in-phase results and phases building soils and sediments of the studied area. Contamination mapping, using combined scanning electron microscopy-energy dispersive spectrometry (SEM-EDS), X-ray diffraction (XRD) and EM methods, allowed to distinguish the main migration path of PTEs from the slag dump. This path is related to the effluent in which the presence of sulphides, oxides and hydroxides concentrating Cd, Zn, and Pb was determined to cause both high conductivity (>300 mS/m) and in-phase values (>6 ppt). On the other hand, soils from other areas outside the dump are not polluted by this migration path. Application of EM mapping confirmed its usefulness as a tool for tracking environmental contamination. For successful interpretation, however, it must always be used in combination with mineralogical/petrological methods. © 2019 Elsevier Ltd},

note = {13},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85067084102,

title = {Physical constraints on speleothem deformations caused by earthquakes, seen from a new perspective: Implications for paleoseismology},

author = { M.J. Mendecki and J. Szczygieł},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067084102&doi=10.1016%2fj.jsg.2019.06.008&partnerID=40&md5=692cab475bd5b6d0c4c58605bf0d1e1b},

doi = {10.1016/j.jsg.2019.06.008},

issn = {01918141},

year  = {2019},

date = {2019-01-01},

journal = {Journal of Structural Geology},

volume = {126},

pages = {146-155},

publisher = {Elsevier Ltd},

abstract = {Fractured speleothems, important earthquake environmental effects used in paleoseismological studies worldwide, are particularly effective for dating. Here, we discuss physical phenomena that can damage caves. We supplement the discussion with information (frequency characteristics and ground-motion parameters) from areas of mine openings threatened by induced seismicity, as analogs of cave conduits, as both, from a physical point of view, are underground voids affected by oscillations. Theoretical considerations indicate the use of bulk (P-wave) and shear (S-wave) moduli instead of Young's modulus, depending on the type of seismic wave affecting a given speleothem. Application of P-wave and shear moduli enables the calculation of a speleothem's natural frequency, based on measured P- and S-wave velocities as well as on the height and diameter of the speleothem. The relationship between the natural frequency, the acceleration causing speleothem failure, and the height and diameter of speleothems has been determined. Moreover, this acceleration value was compared to expected PGA values in order to find similarities between the two acceleration values. We highlight a phenomenon not previously considered in relation to cave environments, i.e., tunnel waves, which can appear in cave walls. This effect significantly changes oscillation characteristics in a cave, which can result in damage to speleothems which had not been expected to fail. Finally, we present the potential for estimating the minimum magnitude required to damage a cave at a given distance from its source. © 2019 Elsevier Ltd},

note = {10},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85064163042,

title = {Case Studies of Seismic Energy Release Ahead of Underground Coal Mining Before Strong Tremors},

author = { M.J. Mendecki and Ł. Wojtecki and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064163042&doi=10.1007%2fs00024-019-02144-0&partnerID=40&md5=be2a8e96eeb85a224ae7cc2af9e3c049},

doi = {10.1007/s00024-019-02144-0},

issn = {00334553},

year  = {2019},

date = {2019-01-01},

journal = {Pure and Applied Geophysics},

volume = {176},

number = {8},

pages = {3487-3508},

publisher = {Birkhauser Verlag AG},

abstract = {We would like to test the concept that induced seismicity prior to relatively large mining tremor (ML > 2.5; E > 106J) can be inferred from the cumulative Benioff strain release (BSR) as power law time-to-failure before the strong event. This study presents the application of accelerating BSR prior to a large earthquake, widely used in natural seismicity, for analysis of this phenomenon in induced seismicity. The Benioff strain release is quantified as accelerated releases of cumulative (square root sum) of seismic energy in the time series. During the study, five sequences were extracted from the seismic catalogues from two Polish hard coal mines: exhausted Bobrek Mine (data form the IS-EPOS Platform) and from a mine belonging to the Polish Mining Group. Next, a search radius was used to select precursory events and to indicate the type of processes occurring in the coal seam and its vicinity. The fitted power law of cumulative Benioff strain release showed changes of m-parameter. If the value of m was lower than 1.0, the process was regarded as an accelerating-like and if m was higher than 1.0—as a quiescence-like. The investigation of m-parameter vs. the search radius showed the general behaviour of the rock mass in the studied areas and allowed to evaluate the relationship between the critical radius and magnitude of the target event. The obtained scaling relation log(Rc) ~ 0.35 ML is similar to these reported by other authors who analysed natural seismicity which might suggest that the scaling relation works in a wide range of magnitudes. © 2019, The Author(s).},

note = {10},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85060711040,

title = {Relict landslide development as inferred from speleothem deformation, tectonic data, and geoelectrics},

author = { J. Szczygieł and M.J. Mendecki and H. Hercman and W. Wróblewski and M. Glazer},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060711040&doi=10.1016%2fj.geomorph.2019.01.017&partnerID=40&md5=3ae1125ce1a11492c33636c046d4aa6b},

doi = {10.1016/j.geomorph.2019.01.017},

issn = {0169555X},

year  = {2019},

date = {2019-01-01},

journal = {Geomorphology},

volume = {330},

pages = {116-128},

publisher = {Elsevier B.V.},

abstract = {The direct dating of pre- and postfaulting dislocated calcite speleothems afforded new insight into slope failure in the Tatra Mountains in southern Poland. A multi-approach study of the karstic Kalacka Cave (non-crevasse type) enabled us to infer the slope deformation structure, which had been poorly preserved in ground surface topography, using combined methods including geomorphological and structural mapping of cave and ground surfaces, paleostress analysis, near-surface electrical resistivity tomography (ERT) and induced polarization methods (IP), uranium series dating ( 234 U/ 230 Th), calcite microtexture analysis, and stable isotope (δ 18 O and δ 13 C) analysis. Here, slope deformation began with dilation between 280 ± 7 ka and 265 ± 8 ka and proceeded as deep-seated gravitational slope deformations. The final stage consisted of dilation rejuvenation and rockfall during the latest Pleistocene or Holocene (post 35 ± 4 ka). Additionally, some dilations are evident beyond the extent of the landslide detected by ERT, indicating further progradation of slope failure. Since this failure was initiated during the climatic transition from MIS 9 to MIS 8, stable isotope analysis of calcite flowstone layers was applied to test climate factors. The correlation of calcite microtexture and δ 18 O and δ 13 C compositional changes with the interval of dilation activity indicates that regional environment factors, chiefly an increase in precipitation, probably contributed to slope destabilization. © 2019},

note = {19},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85057536180,

title = {Correction to: Application of Multichannel Analysis of Surface Waves to S-Phase Wave Anisotropy Estimation (Acta Geophysica, (2016), 64, 5, (1593-1604), 10.1515/acgeo-2016-0058)},

author = { I. Stan-Kłeczek and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057536180&doi=10.1007%2fs11600-018-0229-8&partnerID=40&md5=7bb0282d31035c60e25f548ec986d334},

doi = {10.1007/s11600-018-0229-8},

issn = {18956572},

year  = {2018},

date = {2018-01-01},

journal = {Acta Geophysica},

volume = {66},

number = {6},

pages = {1525-},

publisher = {Springer International Publishing},

abstract = {In the original version of this article, the authors did not add on page 1602 the acknowledgement section between Conclusion and References. © 2018, Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85048766294,

title = {The utility of rock-bolts as long electrodes for underground ERT surveys in mine settings},

author = { T. Gołębiowski and B. Żogała and M.J. Mendecki and T. Malysa},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048766294&doi=10.1016%2fj.jappgeo.2018.05.010&partnerID=40&md5=066a021b9a3d4c317f9f4e55c626f76f},

doi = {10.1016/j.jappgeo.2018.05.010},

issn = {09269851},

year  = {2018},

date = {2018-01-01},

journal = {Journal of Applied Geophysics},

volume = {155},

pages = {122-130},

publisher = {Elsevier B.V.},

abstract = {The aim of the study is to analyse the effectiveness of rock-bolts applied as electrodes in Electrical Resistivity Tomography (ERT). ERT surveys were carried out with the use of expansive rock-bolts mounted on the roof of a copper mining excavation in Poland. The application of rock-bolts as electrodes renders ERT surveys more cost efficient and less time consuming than ones employing standard electrodes that require drilling and mounting in the rock mass. In order to analyse the utility of expansive rock-bolts, comparative surveys were carried out on the surface and in another mining excavation with geological and mining conditions similar to the excavation where expansive rock-bolts were used. The results of surface tests show that there is only a slight difference in resistivity distribution between surveys carried out with the use of standard, short electrodes and the long ones. For results obtained during the surface tests, a statistical analysis was applied. The surveys carried out in both excavations delivered similar information about the distribution of the main anomalies located over the roofs. The goal of ERT surveys carried out in mining conditions was to detect the fractured zones which might be sources of outflow of gas and/or water to the excavations. © 2018},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85054375798,

title = {Ground-motion prediction equation and site effect characterization for the central area of the Main Syncline, Upper Silesia Coal Basin, Poland},

author = { M.J. Mendecki and A. Duda and A.F. Idziak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054375798&doi=10.1515%2fgeo-2018-0037&partnerID=40&md5=cd843a71a2b3c99651c93a00dbf8a8cf},

doi = {10.1515/geo-2018-0037},

issn = {23915447},

year  = {2018},

date = {2018-01-01},

journal = {Open Geosciences},

volume = {10},

number = {1},

pages = {474-483},

publisher = {De Gruyter Open Ltd},

abstract = {The aim of the study was to find the best model of ground-motion prediction equation (GMPE) forecasting peak ground acceleration (PGA) caused by induced seismicity. The maximum values of PGA on the surface are a major seismic threat for the infrastructure, especially in the highly urbanized areas, such is the Upper Silesian Metropolitan Area. The forecasting equations were estimated based on the values of PGA, epicenter distances and mining tremor energy registered by 14 surface seismometer stations located in the central area of the Main Syncline of the Upper Silesia Coal Basin. Data were collected within the period from January 2010 to December 2016, and the total number of seismic events used in the calculations was 15 541. The final model predicted the PGA values and amplification coefficients representing the characteristics of the site effects under seismometer stations. © 2018 M. J. Mendecki et al., published by De Gruyter.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85046450566,

title = {Geophysical investigation of spatial distribution of the jurassic raft in Golaszyn near Łuków, E Poland [Geofizyczne rozpoznanie zasiȩgu kry jurajskiej w Gołaszynie k. Łukowa]},

author = { M.J. Mendecki and M. Świder and I. Nowaczyńska and A. Mamak and J. Odrobińska and P. Piotrowska and J. Rewers and A. Tymińska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85046450566&partnerID=40&md5=e58c52af04eea38e5334e577437ceb83},

issn = {00332151},

year  = {2018},

date = {2018-01-01},

journal = {Przeglad Geologiczny},

volume = {66},

number = {1},

pages = {48-54},

publisher = {Polish Geological Institute},

abstract = {The paper deals with the study ofthe Middle Jurassic clays near the town of Łuków, to identify its position, depth and thickness defined using geoelectrical techniques. The electrical properties of the ground were determined by a non-invasive 2D Resistivity Imaging Method which involves the investigation of the distribution of resistivity in the ground in X and Z direction. The measurements were carried out on four survey profiles that allowed to distinguish the horizontal and vertical extent of the Jurassic raft. It is not regular, but represents a more complicated structure. The values of resistivity, identified with the Jurassic clays, were very low and reached about 1-20 Ω.m, which allowed interpreting, on each resistivity cross-section, its thickness changing from a few metres up to tens of metres. © 2018 Polish Geological Institute. All rights reserved.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85040928763,

title = {Determination of Elastic Parameters of Near-Surface Layers Over Subsidence Trough Development During Longwall Exploitation},

author = { M.J. Mendecki and K. Jochymczyk and W.M. Zuberek and R. Tomaszewska},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040928763&doi=10.1515%2famsc-2017-0050&partnerID=40&md5=573005f337d213ff300a8280ee86d2d9},

doi = {10.1515/amsc-2017-0050},

issn = {08607001},

year  = {2017},

date = {2017-01-01},

journal = {Archives of Mining Sciences},

volume = {62},

number = {4},

pages = {705-716},

publisher = {Walter de Gruyter GmbH},

abstract = {Seismic and geodetic studies were carried out before, during, and after underground exploitation of a coal bed in Katowice - Kleofas Coal Mine, located in the Upper Silesia Coal Basin, Poland. Development of a subsidence trough was completed approximately 3 months after passage of a longwall exploitation in the coal seam. This was the time required for the subsidence trough to appear on the surface, which was confirmed by levelling measurements. Sharp changes in the elastic parameters were observed on each profile during subsidence trough development. This observation can result from changing tension and compression forces caused by increase and/or decrease of the elastic parameters of the rock mass. After completion of subsidence trough development, the rock mass appeared to return to its isotropic state and the observed changes ceased. Some minor fluctuations were noted, but they probably resulted from changes in groundwater levels, which might have affected the measured parameters. © 2018 Archives of Mining Sciences.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85028340223,

title = {Determination of Destress Blasting Effectiveness Using Seismic Source Parameters},

author = { Ł. Wojtecki and M.J. Mendecki and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028340223&doi=10.1007%2fs00603-017-1297-9&partnerID=40&md5=d7028e610ce72205e260d902bf2f3021},

doi = {10.1007/s00603-017-1297-9},

issn = {07232632},

year  = {2017},

date = {2017-01-01},

journal = {Rock Mechanics and Rock Engineering},

volume = {50},

number = {12},

pages = {3233-3244},

publisher = {Springer-Verlag Wien},

abstract = {Underground mining of coal seams in the Upper Silesian Coal Basin is currently performed under difficult geological and mining conditions. The mining depth, dislocations (faults and folds) and mining remnants are responsible for rockburst hazard in the highest degree. This hazard can be minimized by using active rockburst prevention, where destress blastings play an important role. Destress blastings in coal seams aim to destress the local stress concentrations. These blastings are usually performed from the longwall face to decrease the stress level ahead of the longwall. An accurate estimation of active rockburst prevention effectiveness is important during mining under disadvantageous geological and mining conditions, which affect the risk of rockburst. Seismic source parameters characterize the focus of tremor, which may be useful in estimating the destress blasting effects. Investigated destress blastings were performed in coal seam no. 507 during its longwall mining in one of the coal mines in the Upper Silesian Coal Basin under difficult geological and mining conditions. The seismic source parameters of the provoked tremors were calculated. The presented preliminary investigations enable a rapid estimation of the destress blasting effectiveness using seismic source parameters, but further analysis in other geological and mining conditions with other blasting parameters is required. © 2017, The Author(s).},

note = {19},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85013223033,

title = {100 Years of earthquakes in the Pamir region as recorded in juniper wood: A case study of Tajikistan},

author = { P. Owczarek and M. Opała-Owczarek and O. Rahmonov and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85013223033&doi=10.1016%2fj.jseaes.2017.02.011&partnerID=40&md5=69eea2020cfd4f1127c23e138c4d7f7a},

doi = {10.1016/j.jseaes.2017.02.011},

issn = {13679120},

year  = {2017},

date = {2017-01-01},

journal = {Journal of Asian Earth Sciences},

volume = {138},

pages = {173-185},

publisher = {Elsevier Ltd},

abstract = {Active tectonics reflect high seismicity rates in the Pamir and surrounding areas. Long-lived trees growing in the western Pamir-Alay mountains are affected by ground accelerations and seismic-induced geomorphic processes. At a high-mountain site in the Pamir-Alay, 45 juniper trees were sampled in order to analyze the potential role of these trees in the reconstruction of disturbance events. Although the trees have a maximum age c. 500 years, only the period of the last 100 years was analyzed, aiming for the dendrochronological identification of earthquake events known by historic documents and measurements. Analysis mainly showed non-climatic growth suppression and releases. These signals were identified as the results of tectonic disturbances. Tree-ring data recorded many earthquakes from which the most distinct were: 1907, 1923, 1943, 1955, 1982, and 1998. The 1907 and 1923 large earthquakes took place after the vegetation period; therefore, growth reduction appeared in the following year. The 1943, 1955, 1982, and 1998 events occurred just before or during the vegetation period and therefore induced the immediate reduction of tree rings in the earthquake year. The identification of the characteristic growth ring patterns, which are a response to large earthquakes, will enable the reconstruction of these events in the past on the basis of centuries-long dendrochronological records. © 2017 Elsevier Ltd},

note = {13},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85014059171,

title = {Application of electrical resistivity imaging (ERI) for the assessment of peat properties: A case study of the Całowanie Fen, Central Poland},

author = { S. Kowalczyk and K.A. Zukowska and M.J. Mendecki and D. Łukasiak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014059171&doi=10.1007%2fs11600-017-0018-9&partnerID=40&md5=3e6d3f8663d19627ee61ca4ef67c76c6},

doi = {10.1007/s11600-017-0018-9},

issn = {18956572},

year  = {2017},

date = {2017-01-01},

journal = {Acta Geophysica},

volume = {65},

number = {1},

pages = {223-235},

publisher = {Springer International Publishing},

abstract = {Complex studies were carried out to recognize the fen structure and peat properties in the Całowanie Fen area, belonging to the Natura 2000 network. The studies were conducted in two study areas that differ significantly in terms of peat thickness. Electrical resistivity imaging (ERI) was used to identify the properties of the peat and its substrate, such as thickness and electrical resistivity. Comparison of the field studies with the laboratory tests has shown that the ash content rises electrical resistivity in peat. In addition, the study has shown that the application of non-invasive geophysical methods in protected areas is justified. The fen, as a medium containing mostly water, was a proper test area for the ERI measurements. © 2017 The Author(s).},

note = {13},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84995916457,

title = {Application of Multichannel Analysis of Surface Waves to S-Phase Wave Anisotropy Estimation},

author = { I. Stan-Kłeczek and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995916457&doi=10.1515%2facgeo-2016-0058&partnerID=40&md5=b487dbd4aacb6fe0454af89f1a1782d6},

doi = {10.1515/acgeo-2016-0058},

issn = {18956572},

year  = {2016},

date = {2016-01-01},

journal = {Acta Geophysica},

volume = {64},

number = {5},

pages = {1593-1604},

publisher = {De Gruyter Open Ltd},

abstract = {The Multichannel Analysis of Surface Waves (MASW) is an increasingly used technique for recognition of a shallow geological structure and estimation of geotechnical parameters, e.g., S-wave velocity, layer density, layer thickness, shear modulus, estimated P-wave velocity, and estimated Poisson ratio. MASW surveys were carried out in two limestone quarries in the southern part of Poland. The experimental areas are characterised by a simple geological structure: consolidated Triassic limestone. Measurement profiles were arranged as a shapely six-pointed star. For each survey line, 12 geophones with 2-meter (Deposit 1) and 3-meter (Deposit 2) spacing were applied. The research allowed to compare P- and S-wave velocity changes with the main crack systems in the studied rock masses. © 2016 Stan-Kłeczek and Mendecki.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84995550681,

title = {The seismic source parameters of tremors provoked by destress blastings in coal seam},

author = { Ł. Wojtecki and M.J. Mendecki and W.M. Zuberek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995550681&doi=10.1134%2fS1062739116020382&partnerID=40&md5=9ae9bdf5e3cd7d3b5cd44a515df9398e},

doi = {10.1134/S1062739116020382},

issn = {10627391},

year  = {2016},

date = {2016-01-01},

journal = {Journal of Mining Science},

volume = {52},

number = {2},

pages = {258-264},

publisher = {Springer New York LLC},

abstract = {Underground mining of coal seams in the Upper Silesian Coal Basin is currently being carried out under difficult geological and mining conditions. Rockburst hazard can be minimized via the use of active rockburst prevention, where destress blastings take an important role, especially during mining under disadvantageous geological and mining conditions. Presented paper shows how seismic source parameters may be useful to study destress blastings effects. Destress blastings were performed in coal seam no. 510 during longwall mining of coal seam no. 510 in one of the coal mines in the Upper Silesian Coal Basin. The presented preliminary investigations have given possibility for rapid estimation of destress blasting effectiveness with the use of seismic source parameters, but further analysis under other geological and mining conditions and other blasting parameters is needed. © 2016, Pleiades Publishing, Ltd.},

note = {3},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84954159804,

title = {An attempt to determine the seismic moment tensor of tremors induced by destress blasting in a coal seam},

author = { Ł. Wojtecki and M.J. Mendecki and W.M. Zuberek and M. Knopik},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84954159804&doi=10.1016%2fj.ijrmms.2016.01.002&partnerID=40&md5=0380cb7c6e59017ee733750894564f11},

doi = {10.1016/j.ijrmms.2016.01.002},

issn = {13651609},

year  = {2016},

date = {2016-01-01},

journal = {International Journal of Rock Mechanics and Mining Sciences},

volume = {83},

pages = {162-169},

publisher = {Elsevier Ltd},

abstract = {[No abstract available]},

note = {23},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84971458089,

title = {The use of geoelectrical method in preliminary investigation of the fredro family’s iron mine adit in the village of cisna, the bieszczady mountains, se Poland},

author = { M.J. Mendecki and E. Janowska and R. Kaczmarzyk and A.F. Idziak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84971458089&doi=10.13168%2fAGG.2015.0053&partnerID=40&md5=63c9c016662c7172bf15e2a1d8edfd1f},

doi = {10.13168/AGG.2015.0053},

issn = {12149705},

year  = {2016},

date = {2016-01-01},

journal = {Acta Geodynamica et Geomaterialia},

volume = {13},

number = {2},

pages = {159-165},

publisher = {Academy of Sciences of the Czech Republic,},

abstract = {The study over the historical Rose iron mine adit were performed to find and map its location. In order to locate the exploited adit the resistivity imaging method was applied. Measurements were carried out along six survey profiles perpendicularly intersecting the adit. Measurements done along first three profiles were performed with application of 5 m electrode spacing and the total length of electrode array reached 200 m. For the profiles 4th and 6th 10 m electrode spacing was applied what gave total profile length of 400 m. The 5th profile possessed 5m electrode spacing and total length of 470 m. Roll-along technique was designed on this profile. For all measurements the Sweden equipment Lund produced by ABEM company was applied. Each resistivity cross-section was obtained after the robust inversion using Res2Dinv software. The results showed high resistivity anomalies located in areas suspicious as the adit, beneath the main ridge of Mochnaczka-Jeleni Skok Mountain. Near the adit entrance known from the historical information, the main anomaly was disturbed, probably because of the collapse of a tunnel entrance which could be seen in terrain morphology. It is supposed that on further distances the adit retained its character, however, it can be filled with secondary deposits or flooded. © 2016, Academy of Sciences of the Czech Republic. All rights reserved.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84966622104,

title = {Permafrost prospecting and geological structure of Mt. Babia Góra in the light of the electroresistivity imaging method [Poszukiwanie wieloletniej zmarzliny i budowa geologiczna Babiej Góry w świetle wyników obrazowania elektrooporowego]},

author = { W. Dobiński and M. Glazer and B. Bieta and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966622104&doi=10.7163%2fPrzG.2016.1.2&partnerID=40&md5=cca6c038ed2cabdab22ed1a4943827b0},

doi = {10.7163/PrzG.2016.1.2},

issn = {00332143},

year  = {2016},

date = {2016-01-01},

journal = {Przeglad Geograficzny},

volume = {88},

number = {1},

pages = {31-51},

publisher = {Polska Akademia Nauk},

abstract = {The article reports the results of fi eldwork carried out on the peak of Babia Gora to verify a hypothesis regarding the existence of permafrost at this location. The climate and geomorphological evolution of this area suggest that both past and current frost processes play an important role here. Furthermore, not far from this massif - in the Tatra Mts - permafrost was detected at an altitude of ca. 2000 m a.s.l., in an area where mean annual air temperature (MAAT) drops to minus 0.8°C. The MAAT at the summit of Babia Gora is likewise below 0°C. Given that long-term freezing of the massif in the glacial period reached down to considerable depths, the climatic evolution of the massif indicates that permafrost could have lasted through to the present time. In the study area three resistivity profi les were made using the resistivity imaging method. Two of these were 300 m long and one 400 m. The depth of interpretation extends to approx. 90 m below the ground surface in the last case. While the results of the geophysical surveys do not confi rm the presence of permafrost in the study area unambiguously, its presence may not be precluded in certain places in the shallow subsurface layer. The permafrost originating in older geological periods and located at greater depth was probably exposed to relatively rapid degradation, given the geological structure of Babia Góra allowing for deep water drainage. Resistivity models shows the geological structure of the research area close to the summit of Babia Góra, but do not resolve the issue of the existence of modern or fossil permafrost. The temperature of the water in springs located close to the summit is almost constant, though, and does not exceed 1°C. This shows that water circulation is a relatively deep one, and the temperature within the massif cannot therefore be higher than this. The existence of permafrost is not therefore precluded, and this might be possible in the form of the cryotic state. The measurements made present only the fi rst approach to the hypothesis regarding the possible existence of permafrost on Babia Góra, and further research applying other, complementary methods may still change views on this subject. © 2016, Polska Akademia Nauk. All Rights reserved.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84937192412,

title = {Application of DOI index to analysis of selected examples of resistivity imaging models in Quaternary sediments},

author = { M. Glazer and M.J. Mendecki and M. Mycka},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84937192412&doi=10.2478%2fsqua-2014-0011&partnerID=40&md5=5d3c4dcc76a5425654e73f47791443d3},

doi = {10.2478/squa-2014-0011},

issn = {16415558},

year  = {2014},

date = {2014-01-01},

journal = {Studia Quaternaria},

volume = {31},

number = {2},

pages = {109-114},

publisher = {Scientific Publishers OWN},

abstract = {Interpretation of resistivity cross sections may be in many cases unreliable due to the presence of artifacts left by the inversion process. One way to avoid erroneous conclusions about geological structure is creation of Depth of Investigation (DOI) index maps, which describe durability of prepared model with respect to variable parameters of inversion. To assess the usefulness of this interpretation methodology in resistivity imaging method over quaternary sediments, it has been used to one synthetic data set and three investigation sites. Two of the study areas were placed in the Upper Silesian Industrial District region: Bytom-Karb, Chorzów-Chorzów Stary; and one in the Southern Pomeranian Lake District across Pilawa River Valley. Basing on the available geological information the results show high utility of DOI index in analysis of received resistivity models, on which areas poorly constrained by data has been designated. © Scientific Publishers OWN. All rights reserved.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84911449988,

title = {Application of passive seismic to shallow geological structures in urban areas},

author = { M.J. Mendecki and M. Glazer and M. Mycka},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911449988&doi=10.2478%2fsqua-2014-0012&partnerID=40&md5=5c70e4c176e5e7df1b13f825e76c55a9},

doi = {10.2478/squa-2014-0012},

issn = {16415558},

year  = {2014},

date = {2014-01-01},

journal = {Studia Quaternaria},

volume = {31},

number = {2},

pages = {115-122},

publisher = {Scientific Publishers OWN},

abstract = {To study the shallow geological structure the Refraction Microtremor (ReMi) method was applied. This technique uses seismic noise analysis where a source of this small vibrations is the human activity e.g.: traffic, production, factories. The surveys were carried out in selected urban areas in the region of the Upper Silesian Industrial District: Sosnowiec-Pogon , Chorzow-Chorzow Stary and Bytom-Karb. Each area is characterized by the presence of nearby roads with a very high traffic. The results of passive seismic (ReMi) were confronted with data obtained using Multichannel Analysis of Surface Waves (MASW) and resistivity imaging (RI). Seismic surveys were performed by apparatus PASI with 24 channels using geophones of 4.5Hz. The results showed that passive seismic can be satisfactorily used in such urban conditions. The shallow geological structure interpreted by seismic methods have been well-correlated with resistivity studies. © Scientific Publishers OWN. All rights reserved.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84891665405,

title = {An attempt to dendroclimatic reconstruction of winter temperature based on multispecies tree-ring widths and extreme years chronologies (example of Upper Silesia, Southern Poland)},

author = { M. Opała-Owczarek and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891665405&doi=10.1007%2fs00704-013-0865-5&partnerID=40&md5=d3f98b9d70d5c794bec7939944283bc7},

doi = {10.1007/s00704-013-0865-5},

issn = {0177798X},

year  = {2014},

date = {2014-01-01},

journal = {Theoretical and Applied Climatology},

volume = {115},

number = {1-2},

pages = {73-89},

publisher = {Springer-Verlag Wien},

abstract = {This study aims at investigating pre-instrumental tree-ring based winter thermal conditions from Upper Silesia, southern Poland. The Scots pine, pedunculate oak and sessile oak ring widths and the extreme index were used to reconstruct winter mean temperature back to A.D. 1770. The climate response analysis showed that the pine is the most sensitive to February (0.36) and March (0.41) temperature, the oaks were found to be sensitive to the previous December (0.27) and January (0.23) temperature. It was found out that the combination of temperature sensitive species and an additional extreme index in regression can improve the reconstruction, with an emphasis on more reliable reconstruction of extreme values. The elimination of variance reduction and precise reconstruction of actual values of temperature is possible by scaling. The obtained calibration/verification results suggest that, through the application of the long-term composite chronologies a detailed study of the climate variability in Upper Silesia in past centuries can be provided. © 2013 The Author(s).},

note = {22},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84873347209,

title = {VLF mapping and resistivity imaging of contaminated quaternary formations near to 'panewniki' coal waste disposal (Southern Poland)},

author = { A. Kowalska and M. Kondracka and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84873347209&partnerID=40&md5=d8011c7e111569b24074d47be2064c27},

issn = {12149705},

year  = {2012},

date = {2012-01-01},

journal = {Acta Geodynamica et Geomaterialia},

volume = {9},

number = {4},

pages = {473-480},

abstract = {The purpose of this work was to detect groundwater pollution and to identify the conditions of soil and groundwater near the coal waste disposal "Panewniki" Halemba-Wirek Coal Mine using geoelectrical measurements. The first applied method was the VLF (Very Low Frequency) technique. This method, using military signals, allowed to perform the in-phase and the quadrature maps. Data were collected from four study areas located near the coal waste dump. Observed anomalies on both maps for each area showed places with different conductivity allowed to detect the contaminated and uncontaminated zones. The VLF survey indicated that the contamination occurs in the eastern part of study area and is characterized by positive values of both measured electrical fields (the in-phase and the quadrature components). After preliminary contaminated zones were recognized using VLF method, an electrical imaging method was applied. Two electrical imaging profiles were carried out near the waste dump. The measurements allowed to create the geoelectrical model of surrounding area and to investigate the leachate plume. The electrical imaging showed that the greatest pollution occur in the area immediately adjacent to the coal waste what is confirmed by VLF survey. Based on the geological and geophysical knowledge from archives and on present researches, the contaminated aquifer with electrical resistivity of 5 to 15 Ωm deposited at depths of 3 to 7 m was found.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84863843135,

title = {Application of self potential method in the area contaminated with oil derivatives},

author = { B. Żogała and M.J. Mendecki and W.M. Zuberek and M. Robak},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84863843135&partnerID=40&md5=0c6e2101f3c7e216e50ffa9f48885469},

issn = {12149705},

year  = {2012},

date = {2012-01-01},

journal = {Acta Geodynamica et Geomaterialia},

volume = {9},

number = {2},

pages = {179-189},

abstract = {Oil derivatives contamination of soils effects in changes of many physical properties of soil such as: electrical resistivity, conductivity and self potential (SP) as well. Thus the measurable anomalies of these properties are possible to detect with geoelectrical measurements. SP geoelectrical measurements were carried out in the area of controlled oil spill. The oil was spilled into vadose zone of dry sands. The first underground water level was observed at the depth of 10 m. The measurements were carried out along 20 m long profile situated above 3 m long contaminated zone. The part of contaminated zone (1.5 m) had been subjected to bioremediation process with yeasts Yarrowia lipolytica since 4 months. In the border of contaminated zone and biodegradated one chemical gradient was developed and significant increase of self potentials values can be observed. The measurements were carried out with potential gradient method. Lund Imaging System equipment and non-polarizable electrodes (Cu/CuSO 4) were applied. Above contaminated and biodegraded zone distinct SP anomaly (10-20 mV) was measured. The anomaly correlates with results of EM, resistivity imaging and induced polarization investigations.},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84856708257,

title = {Ground-motion prediction equations for induced seismicity in the main anticline and main syncline, Upper Silesian Coal Basin, Poland},

author = { A. Golik and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84856708257&doi=10.2478%2fs11600-011-0070-9&partnerID=40&md5=86d6c6470f71d97cd73416d0b89cf1e5},

doi = {10.2478/s11600-011-0070-9},

issn = {18956572},

year  = {2012},

date = {2012-01-01},

journal = {Acta Geophysica},

volume = {60},

number = {2},

pages = {410-425},

abstract = {The purpose of the research was to determine parameters of ground-motion models for two areas characterized by considerable induced seismicity and different geology. Fifty-nine events collected from surface seismological stations of coal mine "Bielszowice" (at the Main Anticline; South Poland) and 144 events from coal mine "Ziemowit" (at the Main Syncline; South Poland) were used for computation. For both areas, simple ground-motion prediction equations (GMPEs) without site effects were derived, but the model was acceptable only for "Bielszowice" area. The GMPE was calculated once again for "Ziemowit", but this time we took into consideration the amplification coefficient, which significantly improved the model solution. Finally, the theoretical value of amplification was calculated. Knowing that the amplification is associated with subsurface layers, we used three different models of overburden: (i) with Quaternary sediments only, (ii) with a complex of Quaternary-Tertiary sediments, and (iii) with a complex of Quaternary-Tertiary-Triassic sediments and Carboniferous as a basement. Usually, the amplification of vibrations appears in the Quaternary sediments. However, theoretical calculations of amplification were consistent with the results obtained from GMPE when a rigid Carboniferous substratum was applied. © 2011 Versita Warsaw and Springer-Verlag Wien.},

note = {10},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84894622019,

title = {Seismic and Geodetic Observations of Subsidence Trough Development Over a Longwall Face in a Coal Bed Under Extraction},

author = { M. Bogusz and M.J. Mendecki},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894622019&doi=10.1007%2f978-3-642-19097-1_7&partnerID=40&md5=2939b42ab5f35d770ffa5cceccb4bfc5},

doi = {10.1007/978-3-642-19097-1_7},

issn = {21905193},

year  = {2011},

date = {2011-01-01},

journal = {GeoPlanet: Earth and Planetary Sciences},

volume = {3},

pages = {71-79},

abstract = {The rock layers located in the vicinity of mining works are deformed as a result of mining exploitation. Such deformations cause a development of subsidence trough over a coal bed under extraction. The distortions also contribute to the appearance of seismic events in the mining works area. The goal of measurements was to find a relation between these phenomena. The research was carried out over longwall face 183, coal bed 418, belonging to the coal mine "Pokój" in Ruda Śląska. The size of surface deformation was determined from GPS measurements performed on the benchmarks (BM) located over the longwall face under study. The GPS data were also used to determine the maximum surface subsidence velocity (MSSV) in the trough area and to assess the approximate time of occurrence of maximum surface subsidence velocity (MSSV average time). Finally, the relations between subsidence parameters and seismic activity were sought. © Springer-Verlag Berlin Heidelberg 2011.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}