ESTIMATION OF GAS PRESSURE IN MINED-OUT SPACE OF CLOSED MINES
The pressure of methane-air mixture in mined-out space of several closed mines located within Donetsk-Makeevka coal region is calculated on the basis of the data about the distribution of mined-out coal beds and accompanying beds over the depth. It is demonstrated that methane pressure is determined by the formation pressure in the accompanying bed, depth and the ratio of the thickness of the accompanying bed and wallrock. The estimation can be applied to the forecast of the time of accumulation of methane of dangerous concentration in near-surface soil and buildings on the territory above the closed mines.