The estimation of a possibility of outburst origin in long mine workings

Abstract

The article brings results of the evaluation of a possibility of coal and gas outburst origin on the basis of calculation of active forces that try to induce an outburst and passive forces that prevent an outburst from occurring. The analysis of outbursts from the Paskov Mine, Staříč plant, shows that decisive indicators, by which a proneness to coal and gas outburst origin is evaluated, indicated an increased hazard characterizing the 2nd hazard degree and requiring certain preventive measures only in a small number of the coal and gas outbursts. The aim of this contribution is to point out other influences participating in a possible origin of coal and gas outbursts (e.g. strength of coal matter, parameters of a mine working, its cross-section, circumference, and daily advance, variability in seam thickness, influence of tectonic disturbance level), and by using the mathematical model to indicate possibilities of the application of this model in a case of evaluation of coal seam proneness to coal and gas outbursts.