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Stress state analysis of rock mass in mining close-spaced coal seams with smooth roof subsidence

The author analyzes stress state of rock mass in mining bedded deposits with roof rock deformation in the course of the smooth subsidence of the roof in the mined-out area. The analysis focuses on modeling roof and floor interaction in roadways, which governs the distribution and values of stresses in the zones of the abutment pressure and stress relief. The features of stress redistribution in enclosing rock mass during successive mining of closely spaced coal seams are studied. The recommendations on selection of the parameters of technology for joint mining of closely spaced coal seams with regard to mutual effect of mining-induced geomechanical processes are given.