关键词: 瓦斯抽采, 顺层抽采, 交叉钻孔, 采前预抽

Abstract: This paper introduces the conditions of coal seam occurrence and 22518 mining face in Dong Jia He Coal mine, analyzes gas emission law of the mining face. Adopts the cross borehole pre pumping and Side pumping by side mining , while layout high drilling for extraction of overlying coal seam gas in mining face. pipes drainage Upper angle in mining surface for the empty area gas as the standby method. Drainages test effects and finds the residual gas content extraction is 2.4m3/t, desorption gas content ranges from 0.65m3/t to 1.12m3/t, the two indexes less than the 6m3/t in the requirements of "coal mine gas extraction standards Interim Provisions". So as to provide same reference for the gas extraction design of the mining face at coal mines with similar condition

Key words: Gas extraction, Cross drilling, consequent drainage, draining while mining