针对单一低透煤层瓦斯抽采浓度低、衰减快、瓦斯抽采困难等问题,提出了水力压裂增透技术.研究了水力压裂钻孔壁煤体起裂所需最小注水压力,分析了水力压裂过程中注水压力、流量等参数随注水时间动态变化特点,并对压裂前后煤层透气性系数变化和瓦斯抽采效果进行了考察.结果显示:实施水力压裂后,影响区内煤层透气性系数提高了20.32倍,平均瓦斯抽采浓度和纯量分别提高了4.1倍和5.1倍,水力压裂增透效果显著. Aiming at the problems of low concentration, fast attenuation and difficult gas drainage in a single low permeability coal seam, the hydraulic fracturing and anti-seepage technology is put forward.The minimum water injection pressure required for hydraulic fracturing of borehole wall rock is analyzed, The parameters of water injection pressure and flow rate during hydrodynamic fracturing are dynamically changed according to the water injection time, and the gas permeability and gas drainage effect before and after fracturing are investigated. The results show that after the hydraulic fracturing, The air permeability coefficient increased by 20.32 times. The average gas drainage concentration and the pure amount increased by 4.1 times and 5.1 times respectively. The effect of hydraulic fracturing and permeation enhancement was remarkable.