Evaluation of methane and rock outbursts basing on limit index of gas desorption intensity from coal

摘要

The currently used manometric liquid desorbometer DMC-2 type and electronic device "Barbara" type for determination of the estimated natural origin methane in coal (methane bearing capacity) and the gas desorption intensity index value from coal for forecasting methane and rock outbursts state of hazard as well as a new method of the limit index of gas desorption intensity from coal determination are described. Evaluation of gas and rock outburst state of hazard at the heading face of a driven mining working as well as possibility of outburst occurrence in the face enables the limit index of gas desorption intensity from coal P_2>36.9 hPa. determined by means of the electronic device "Barbara" type directly in the place of coal seam testing in the driven mining working.