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谢二矿3312<3>回采工作面是一个高瓦斯工作面。绝对瓦斯涌出量为10.32米~3/分,相对瓦斯涌出量为24.67米~3/吨。回采前预计该工作面绝对瓦斯涌出量为11.64米~3/分,相对瓦斯涌出量为23.12米~3/吨。决定采用顶板瓦斯道结合钻孔抽排以及增做腰巷等方法,使回采瓦斯由集中涌出变为分散排出以减少回采时的瓦斯涌出量。实践证明,此方法具有较好的技术与经济效果。
Xie Er Mine 3312 <3> mining face is a high-gas face. The absolute gas emission is 10.32m ~ 3 / min, relative gas emission is 24.67m ~ 3 / t. Before mining, it is estimated that the total gas emission from this working face is 11.64m ~ 3 / min and the relative gas emission is 23.12m ~ 3 / t. Decided to adopt the combination of roof gas drainage with drilling drainage and the increase of waistlines to make the gas recovered from concentrate to disperse and disperse to reduce the gas emission when mining. Practice has proved that this method has good technical and economic effects.