关键词: 综采工作面, 瓦斯抽采, 顺层抽放, 裂隙带抽采, 埋管抽采, 瓦斯浓度

Abstract: This paper introduces the conditions of coal seam occurrence and 1206 mining face at Si Ma Coal mine, analyzes gas emission law of the mining face. Analyzes between the working face gas and air supply relations, and then adopts the combination of crossing boreholes and Fracture zone extraction, Pipes drainage for the empty area gas as the standby method. Pre-pumping test effects and finds the residual gas content extraction is 3.8128m3/t, less than the specified value of 4.5m3/t. result completely meets the standard, drawing at stope face test results and finds the upper corner gas concentration are less than 1%. The average is 0.266%, 92 percent gas concentrations are lower than 0.4%. The gas concentrations in air return are less than 0.6%, which ranges from 5.4529m3/t to 5.9705m3/t, the average concentrations is 0.35%, 90 percent gas concentrations are lower than 0.5%.