The stress distribution and formation of damage zones at the final stage of mining in an extraction panel are discussed. The behavior of the host rock mass and coal seam is analyzed in the cases when the disassembly chamber is created beforehand and the longwall approaches it gradually, and when the disassembly room is cut by the continuous heading machine directly at the end stage of longwalling. Various alternatives are considered in the problem formulation in terms of either total or additional stresses. The proposed geomechanical model makes it possible to describe mining-induced redistribution of initial stresses; formation of relaxation and additional loading zones nearby longwall faces as well as around the disassembly chamber; displacement of rocks, in particular, vertical displacements in the roof of DC as well as horizontal displacement on vertical exposures in the face and disassembly chamber. The deformation model used in the problem solving is constructed with regard to possible plastic deformation of coal and immediate roof, which enables accounting to a certain degree for rock mass jointing and nonlinear deformation of coal. It is emphasized that plasticity parameters can be found from solution of the inverse problem using the in-situ experiment data. The calculations used the design parameters of geological and geotechnical conditions typical of Baikaim coal seam in the November 7 Mine of SUEK-Kuzbass.

For citation:  Trofimov V. A., Kubrin S. S., Filippov Yu. A., Kharitonov I. L. Numerical modeling of stress–strain state for host rock mass and thick gently dipping coal seam after mining completion in extraction panel. MIAB. Mining Inf. Anal. Bull. 2019;(8):42-56. [In Russ]. DOI: 10.25018/0236-14932019-08-0-42-56. 


Numerical modeling, geomechanical model, disassembly chamber, longwall, plasticity, stresses, displacement in rock mass.

Issue number: 8
Year: 2019
ISBN: 0236-1493
UDK: 622.33
DOI: 10.25018/0236-1493-2019-08-0-42-56
Authors: Trofimov V. A., Kubrin S. S., Filippov Yu. A., Kharitonov I. L.

About authors: V.A. Trofimov (1), Dr. Sci. (Eng.), Head of Laboratory, S.S. Kubrin (1), Dr. Sci. (Eng.), Professor, Head of Laboratory, Yu.A. Filippov (1), Cand. Sci. (Eng.), Senior Researcher, I.L. Kharitonov, Head of Technical Department, 1) SUEK-Kuzbass JSC, 652507, Leninsk-Kuznetskiy, Russia. Corresponding author: V.A. Trofimov, e-mail: asas_2001@


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