Experimental and analytical investigation of geomechanical dynamics of coal mining near tectonic faults

The geological and geotechnical conditions of Elbansky-5 (E-5) coal seam mining in Osinniki Mine of Raspadskaya Coal Company are analyzed. Using the data of operating seismic monitoring system GITS (VNIMI), seismic activity is investigated in the period of mining operations in extraction panel 4-1-5-7 of E-5 seam. The seismic records within the mine field during mining operations in extraction panel 4-1-5-7 in 2020 displayed the high seismic activity both on the side of a pillar between the test extraction panel being mined and mined-out extraction panel 4-1-5-6, and in front of the longwall face, and identified rockbursthazardous zones at the intersection of a group of tectonic faults and the leading place of the longwall face. With a view to revealing the laws of development of seismically active zones in the areas of higher rock pressure, the mathematical models of the stress–strain behavior of rock mass were constructed using the set of the problem-oriented computer programs developed at the Department of Geotechnology at the Siberian State Industrial University. This article presents the mathematical modeling results on the stress–strain behavior of the nonuniform coaland-rock mass with regard to the influence of longwalls and tectonic faults. The mathematical stress–strain modeling was carried out as a case-study of the mine field enclosing extraction panel 4-1-5-7 of E-5 seam and the pillars around it. The geometry of the theoretical model was created using the geological characteristic of the test site. The qualitative and quantitative relations between the stress–strain behavior and the seismic activity in rock mass are determined.

Razumov E. E., Prostov S. M., Petrova O. A. Experimental and analytical investigation of geomechanical dynamics of coal mining near tectonic faults. MIAB. Mining Inf. Anal. Bull. 2024;(3):102-118. [In Russ]. DOI: 10.25018/0236_1493_2024_3_0_102.

E.E. Razumov¹, Graduate Student, Researcher, JSC Scientific Research Institute of Mining Geomechanics and Surveying — VNIMI Interdisciplinary Research Center, Saint-Petersburg, Russia, e-mail: razumov@vnimi.ru,
S.M. Prostov¹, Dr. Sci. (Eng.), Professor, e-mail: razumov@vnimi.ru,
O.A. Petrova, Cand. Sci. (Eng.), Assistant Professor, Siberian State Industrial University, 654007, Novokuznetsk, Russia, e-mail: ol_petrova@mail.ru,
¹ T. Gorbachev Kuzbass State Technical University, 650000, Kemerovo, Russia.

E.E. Razumov, e-mail: razumov@vnimi.ru.

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