厚煤层综放工作面瓦斯综合治理技术研究

Study on Comprehensive Control of Gas in Thick Coal Seam Fully Mechanized Working Face

针对常村煤矿转入深部开采后,掘进和回采工作面均为高瓦斯工作面的现状,分析了工作面瓦斯主要来源,据此采取顶板高位抽放、倾斜高抽巷、B型均压通风技术、本煤层增透加强预抽等空间立体网络式抽放方式。结果表明,工作面平均抽放率达到40%以上,井下压裂后可使百米钻孔瓦斯流量平均0.2 m3/min,浓度维持在50%以上,确保了矿井深部开采工作面瓦斯治理效果。

Based on the deep mining of Changcun Mine, high gas in advancing and recovery working face, the main resource of gas in working face was analyzed, high roof drainage, incline high-position pumping roadway, B ventilation by even air pressure, coal seam permeability improvement strengthen drainage and other 3d network drainage way were adopted. The result showed that the average extraction rate of the working face was 40% or more, hundreds of meters drilling average gas flow after fracture underground achieved 0.2 m3/min, concentration more than 50%, which ensured the gas control effect of deep mining.