Moldovanov E. Substantiating the parameters of stoping in geomechanical zones of installation chambers of deep levels in the Western Donbas mines

The thesis is intended to solve an actual for the coal mining industry scientific and technical problem with the substantiation of stoping parameters in the geomechanical zones of installation chambers based upon simulation of step-by-step stope advance in the context of a spatial model of an excavation area. Influence by sandstone, hydrostatic pressure in the coal seam roof, changing length of the stope, mine working depth, and stope distancing from the installation chamber are taken into consideration. The problem has been solved by identifying changes in the regularities of a stress-strain state of carbonous rock mass as well as the parameters of load on a stope support. Purpose of the paper is to substantiate stoping parameters with the consideration of sandstone and hydrostatic pressure in the coal seam roof while stope advancing from the installation chamber under complex conditions of the Western Donbas mines. Object of the research is represented by geomechanical processes within the layered transverse and isotopic coal rock mass of the extraction pillar involving sandstone and hydrostatic pressure in the seam roof while stope advancing from the installation chamber. Subject of the research is the effect of regularities of distribution nature of changes in wall rock convergence in a stope along the settlement line of hydraulic powered supports taking into consideration sandstone and hydrostatic pressure in the seam roof on the mining method parameters in the process of stope advance from the installation chamber. Chapter one has made a factor analysis of the forces influencing the nature of distribution of changes in the wall rock convergence value in the stope along the line of a settlement row of hydraulic props of the powered support, analysis of geological conditions, and structural features as well as physicomechanical properties of sandstone occurring in the roof of the mined coal seams. In addition, mine fields have been typed in terms of their common features.