高瓦斯低透气性煤层水力压裂增透技术研究  

Research on Hydraulic Fracturing and Permeability Enhancement Technology for High Gasand Low Permeability Coal Seams

作　　者：左文强 Zuo Wenqiang(China Coal Science and Engineering Group Chongqing Research Institute Co.,Ltd.,Chongqing 400037)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《山东煤炭科技》2023年第5期104-106,109,共4页Shandong Coal Science and Technology

摘　　要：为提高中兴煤矿松软煤层透气性,有效解决传统钻孔瓦斯抽采难题,通过现场工业试验及瓦斯抽采效果对比相结合的方法,对2号松软煤层水力压裂增透技术及工艺进行了研究。结果表明:水力压裂方案实施后,煤层透气性提高明显,瓦斯抽采浓度、流量分别增幅3.6倍、2.7倍,抽采巷风排瓦斯量平均降低0.68 m^(3)/min,减幅27%,水力压裂可有效提升煤层瓦斯抽采效率。In order to improve the permeability of the soft coal seam in Zhongxing Coal Mine and effectively solve the difficult problem of traditional drilling gas drainage,through a combination mathod of on-site industrial experiments and comparison of gas drainage effects,the hydraulic fracturing and permeability enhancement technology and process of the No.2 soft coal seam are studied.The results show that after the implementation of hydraulic fracturing scheme,the permeability of coal seams is significantly improved,with gas drainage concentration and flow rate increasing by 3.6 and 2.7 times respectively.The average reduction of air and gas discharge amount in the extraction roadway is 0.68 m^(3)/min,a decrease of 27%.Hydraulic fracturing can effectively improve the efficiency of coal seams gas drainage.

关 键 词：松软煤层 水力压裂增透 瓦斯抽采 裂隙发育 

分 类 号：TD712.6[矿业工程—矿井通风与安全]