Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method

Physical processes occurring in the focus of tremor can be identified by solving a focal mechanism via the seismic moment tensor inversion method. In this article the estimation of focal mechanisms of strong mining tremors (according to Polish law tremors of energy higher or equal 1·105 J), which oc...

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Main Authors:	Wojtecki Łukasz, Mirek Adam, Dzik Grażyna
Format:	Article
Language:	English
Published:	EDP Sciences 2019-01-01
Series:	E3S Web of Conferences
Subjects:	coal seam edge mining tremor focal mechanism
Online Access:	https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/59/e3sconf_ag2019_01005.pdf

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spelling	doaj-16771ea26646420cb0cbf4d33f91d9472021-02-02T04:22:27ZengEDP SciencesE3S Web of Conferences2267-12422019-01-011330100510.1051/e3sconf/201913301005e3sconf_ag2019_01005Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion methodWojtecki Łukasz0Mirek Adam1Dzik Grażyna2Central Mining InstituteState Mining AuthorityState Mining AuthorityPhysical processes occurring in the focus of tremor can be identified by solving a focal mechanism via the seismic moment tensor inversion method. In this article the estimation of focal mechanisms of strong mining tremors (according to Polish law tremors of energy higher or equal 1·105 J), which occurred during longwall mining of coal seam no. 507 in one of the hard coal mines in the Polish part of Upper Silesian Coal Basin was performed. Totally 7 strong mining tremors with the local magnitude from 1.84 to 2.52 were analysed. The most probable geomechanical processes in the foci of these tremors have been reconstructed. An attempt to determine the correlation between the edges of overlying seams no. 502, 504 or 506 and strong mining tremors occurrence has been made. The strike of determined nodal planes is in accordance with the azimuth of mentioned edges. The difference between them (absolute value) varies from 0.3° to 34.1° (on average approximately 19°).https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/59/e3sconf_ag2019_01005.pdfcoal seam edgemining tremorfocal mechanism
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Wojtecki Łukasz Mirek Adam Dzik Grażyna
spellingShingle	Wojtecki Łukasz Mirek Adam Dzik Grażyna Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method E3S Web of Conferences coal seam edge mining tremor focal mechanism
author_facet	Wojtecki Łukasz Mirek Adam Dzik Grażyna
author_sort	Wojtecki Łukasz
title	Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method
title_short	Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method
title_full	Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method
title_fullStr	Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method
title_full_unstemmed	Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method
title_sort	edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method
publisher	EDP Sciences
series	E3S Web of Conferences
issn	2267-1242
publishDate	2019-01-01
description	Physical processes occurring in the focus of tremor can be identified by solving a focal mechanism via the seismic moment tensor inversion method. In this article the estimation of focal mechanisms of strong mining tremors (according to Polish law tremors of energy higher or equal 1·105 J), which occurred during longwall mining of coal seam no. 507 in one of the hard coal mines in the Polish part of Upper Silesian Coal Basin was performed. Totally 7 strong mining tremors with the local magnitude from 1.84 to 2.52 were analysed. The most probable geomechanical processes in the foci of these tremors have been reconstructed. An attempt to determine the correlation between the edges of overlying seams no. 502, 504 or 506 and strong mining tremors occurrence has been made. The strike of determined nodal planes is in accordance with the azimuth of mentioned edges. The difference between them (absolute value) varies from 0.3° to 34.1° (on average approximately 19°).
topic	coal seam edge mining tremor focal mechanism
url	https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/59/e3sconf_ag2019_01005.pdf
work_keys_str_mv	AT wojteckiłukasz edgesofoverlyingseamsasafactorresponsibleforstrongminingtremorsoccurrenceduringundergroundhardcoalextractioninthelightofseismicmomenttensorinversionmethod AT mirekadam edgesofoverlyingseamsasafactorresponsibleforstrongminingtremorsoccurrenceduringundergroundhardcoalextractioninthelightofseismicmomenttensorinversionmethod AT dzikgrazyna edgesofoverlyingseamsasafactorresponsibleforstrongminingtremorsoccurrenceduringundergroundhardcoalextractioninthelightofseismicmomenttensorinversionmethod
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Edges of overlying seams as a factor responsible for strong mining tremors occurrence during underground hard coal extraction in the light of seismic moment tensor inversion method

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