Comprehensive Control Method of Gas in Upper Corner of High Strength Fully Mechanized Coal Mine

Based on the problem of large gas emission and serious accumulation in upper corner intensive fully mechanized caving face, taking face Wangjialing Coal Mine Hedong as research object, main sources extremely mining with low permeability content were studied. The methods extraction by inserting (burying) pipe directional drilling adopted carried out. application engineering practice comparative test effect are results show that maximum purity is 2.8 m³/min, concentration 0.8% corner, 3.11 m³/min high borehole 0.71% corner. After combined extraction, total 1.33~7.93 fluctuation range reduced to 0.31~0.61% safe point. prevention control working remarkable.