ABSTRACT
In coal industry there is an acute problem of occupational safety provision. Special attention is paid to mines with high gas inflow where high methane concentration repeatedly leads to blow-ups that become the reason of large-scale accidents. The basic requirement for their prevention is safety rules observation during mining operations. But with increase of working depth and methane-inflow of coal seams it is impossible to ensure permissible gas concentration in the air. Under such conditions degassing of gas-bearing coal seams, bearing rocks and worked-out areas is an important technological process contributing to mining operations safety increase and face output increase.
