The Influence of a Local Fault Zone on High Energy Tremor Occurrence During Longwall Mining of a Coal Seam

• Autorzy: Wojtecki Ł. , Knopik M. , Zuberek W. M.

Identyfikatory

DOI

10.1515/acgeo-2016-0040

• Języki publikacji: EN

Abstrakty

EN

Underground mining of coal seams in the Upper Silesian Coal Basin in Poland is accompanied by seismic activity of varying magnitude. The investigations which have been performed for several years distinguished high energy mine tremors connected directly with mining or coupled with geological structures, such as large faults. In mined seams, local fault zones occur. Faults in these zones are usually small, with throws comparable with coal seams thicknesses. Local fault zone may be responsible for the occurrence of high energy tremors as well as large faults, as presented in this article. An analysis of source mechanism of high energy tremors generated during longwall mining of the coal seam No. 510, with presence of a local fault zone, in one of the Polish hard coal mines in the Upper Silesian Coal Basin was performed. For this purpose, the seismic moment tensor inversion method was used. In most of foci, the process of shear predominated. Determined nodal plane parameters were correlated with parameters of faults forming the local fault zone. High energy tremors were generated mostly by dislocations on faults of the local fault zone. Weakening of roof rocks in the neighborhood of local fault zone takes an important role too, and was responsible for share of implosion in the focal mechanism.

Słowa kluczowe

EN

mine tremors; focal mechanism; seismic moment tensor; underground coal mining

PL

wstrząsy górnicze; mechanizm ogniska; tensor momentu sejsmicznego; górnictwo podziemne

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 4
• Strony: 1164--1175
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Wojtecki Ł.

• Kompania Węglowa S.A., Katowice, Poland

autor

Knopik M.

• University of Silesia in Katowice, Faculty of Earth Sciences, Sosnowiec, Poland

autor

Zuberek W. M.

• University of Silesia in Katowice, Faculty of Earth Sciences, Sosnowiec, Poland

Bibliografia

• Aki, K., and P.G. Richards (1980), Quantitative Seismology – Theory and Methods, Vols. 1, 2, W.H. Freeman & Co., San Francisco.
• Gibowicz, S.J. (1995), Mechanism of tremor foci, mining tremors – mechanism, location and energy. In: Proc. School of Underground Mining, 27 February – 3 March 1995, Szczyrk, Poland, 5-30 (in Polish).
• Gibowicz, S.J., and A. Kijko (1994), An Introduction to Mining Seismology, Academic Press, San Diego.
• Knopik, M., W.M. Zuberek, and Ł. Wojtecki (2015), Multisources of high-energy mine tremors occuring during longwall mining of coal seam in varied geological and mining conditions, Prz. Górn. 12, 12-19 (in Polish).
• Kołodziejczyk, P. (2009), Optimization of the seismic network in Kompania Węglowa S.A., Tech. Report, SITG, Gliwice (in Polish, unpublished).
• Kwiatek, G. (2009), Foci-seismic moment tensor – spectral parameters: A description of the program, available from: http://induced.pl/foci.
• Marcak, H., and W.M. Zuberek (1994), Mining Geophysics, Śląskie Wydawnictwo Techniczne, Katowice (in Polish).
• Stec, K. (2009), The focal mechanism and the methods of its calculation. In: Workshop of the “Natural Hazards in the Mining Industry”, 17-19 June 2009, Bogatynia-Świeradów Zdrój, Poland, 287-305 (in Polish).
• Stec, K., and Ł. Wojtecki (2011), Characteristics of the mine tremor source mechanism associated with the mining in the seam 510, the longwall 502 in the “Bielszowice” Coal Mine, Res. Rep. Centr. Min. Inst.: Min. Environ. 1, 61- 77 (in Polish).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę