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鹤煤集团九矿3102掘进工作面瓦斯涌出量为20.6m3/t,采用交叉钻孔、双耳巷钻场和后路浅孔抽采技术,同时加强局部通风和监控系统管理,使回风流瓦斯体积分数下降到0.6%,瓦斯抽采量达569万m3,取得了良好的社会和经济效益。
The gas emission of 3102 heading face of No. 9101 Mine at Hebi Coal Group is 20.6m3 / t. Cross drilling, drilling field with double ears, and shallow hole drainage at rear road are adopted. At the same time, local ventilation and monitoring system management are strengthened so that return air flow Gas volume fraction dropped to 0.6%, gas extraction volume reached 5.69 million m3, and achieved good social and economic benefits.