Mine tremor focal mechanism: An essential element for recognising the process of mine working destruction

Czasopismo : Acta Geophysica
Tytuł artykułu : Mine tremor focal mechanism: An essential element for recognising the process of mine working destruction

Autorzy :
Bogusz, J.
Centre of Applied Geomatics, Military University of Technology, jbogusz@wat.edu.pl,
Saibi, H.
Laboratory of Exploration Geophysics, Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan, saibi-hakim@mine.kyushu-u.ac.jp,
Verbanac, G.
University of Zagreb, Faculty of Science, Department of Geophysics, Zagreb, Croatia, verbanac@irb.hr,
Mustasaar, M.
Department of Geology, University of Tartu, Tartu, Estonia, mario.mustasaar@ut.ee,
Dobróka, M.
Department of Geophysics, University of Miskolc, Egyetemvaros, Miskolc, Hungary, dobroka@uni-miskolc.hu,
Dębski, W.
Institute of Geophysics, Polish Academy of Sciences, Warszawa, Poland, debski@igf.edu.pl,
Tomecka-Suchoń, S.
AGH University of Science and Technology, Kraków, Poland, tomecka@agh.edu.pl,
Kalab, Z.
VSB – Technical University of Ostrava, Faculty of Civil Engineering, Ostrava-Poruba, Czech Republic, kalab@ugn.cas.cz,
Golik, A.
University of Silesia, Sosnowiec, Poland, aneta.golik100@gmail.com,
Kalab, Z.
Institute of Geonics AS CR, Ostrava-Poruba, Czech Republic, kalab@ugn.cas.cz,
Ćmiel, S.
University of Silesia, Faculty of Earth Sciences, Sosnowiec, Poland, stanislaw.cmiel@us.edu.pl,
Stec, K.
Central Mining Institute, Katowice, Poland, kstec@gig.katowice.pl,
Abstrakty : This article presents an analysis of causes of rockburst which occurred in the Rydułtowy-Anna Mine on 24 March 2010. The seismic phenomena and the rockburst hazard connected with them have been determined by a number of natural and technical factors. The dominant factors were the mechanical strength characteristics of coal and surrounding rocks, as well as the values of stress in the surroundings of mine workings. An analysis must take into account the structure of the strata, its susceptibility to rockbursts, development and displacement of areas with high values of stress, as well as critical levels of elastic deformation of the strata. Such an approach must be supported by the results of an analysis of focal mechanisms of tremors to make it possible to recognize mining and geological factors which had the prevailing influence on tremors' location and energy. By presenting a selected example of a real event, the authors would like to point out the importance of the proper description of focal mechanisms of seismic tremors. The analysis of a chain of interacting destruction processes in the developed model of strata would give the explanation why the tremor occurred in the gallery located at a considerable distance from the tremor focus.

Słowa kluczowe : mining seismicity, focal mechanism, rock stress, rock strength,
Wydawnictwo : Instytut Geofizyki PAN
Rocznik : 2012
Numer : Vol. 60, no. 2
Strony : 449 – 471
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Cytuj : Bogusz, J. ,Saibi, H. ,Verbanac, G. ,Mustasaar, M. ,Dobróka, M. ,Dębski, W. ,Tomecka-Suchoń, S. ,Kalab, Z. ,Golik, A. ,Kalab, Z. ,Ćmiel, S. ,Stec, K. , Mine tremor focal mechanism: An essential element for recognising the process of mine working destruction. Acta Geophysica Vol. 60, no. 2/2012