EFFECT OF STRESSES ON THE STRUCTURAL AND FILTRATION CHARACTERISTICS OF COAL
The paper presents the methodology and the results of studies of deformation and fracture of coal (bituminous coal and anthracite) under true triaxial loading at modeling real stress-strain states occurring in the coal seam under technogenic impact. The studies were conducted to develop a geomechanical approach to extraction of methane from gassy coal seams, which is based on the creation of artificial permeability of a coal seam due to the formation of cracks associated with the oriented unloading of reservoir from the rock pressure. The studies were conducted on a unique experimental setup Triaxial Independent Loading Test System of the A. Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences.