GEOMECHANICAL FORECAST OF THE PILLAR CONDITIONS IN UNDERGROUND MINING OF THICK COAL SEAMS
P. V. Grechishkin1, O. A. Petrova2, N. Yu. Troshkov1, F. F. Bashirov1
1Research Institute of Rock Mechanics and Mine Survey, the Inter-branch Research Center “VNIMI”, Kemerovo 650002, Russia
2Siberian State Industrial University, Novokuznetsk, Russia
Keywords: Mine, coal seam, pillar, drift, stoping face, numerical modeling, geophysical methods, rock pressure, rock properties
Abstract
Based on the results of mine geophysical surveys of coal pillars using the ANGEL-M system with the function of electrometric mine equipment and numerical modeling of the stress-strain state of a rock mass, an empirical dependence of the relative intensity and vertical stresses in pillars was obtained when mining thick coal seams. Design solutions for the prevention of geodynamic phenomena are developed using the stress index of the rock mass.
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