水力压裂消突技术在低透气性煤层瓦斯治理的应用  

Application of anti-outburst technology of hydraulic fracturing in gas treatment of low permeability coal seam

作　　者：邓强 DENG Qiang(China Coal Technology&Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)

机构地区：[1]中煤科工集团沈阳研究院有限公司,辽宁抚顺110016 [2]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2021年第1期98-102,共5页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(51774182);中国煤炭科工集团科技创新创业资金资助项目(2018MS014)。

摘　　要：为提高低透气性突出煤层瓦斯治理效果,基于水力压裂的低温、高压、瓦斯解吸快等特性,对低透气性煤层进行水力压裂消突增透试验。试验表明:压裂周围形成裂隙发育区,压裂区域抽采效果提升显著,煤层平均含水率增大1.8倍,单孔抽采浓度提高3.12倍,抽采率提高40%~50%。由于增加裂隙发育以及水驱气的双重作用下,抽采半径由原来的的3 m增加到20 m。水力压裂增透消突技术更加安全、高效。In order to improve the gas permeability of coal seams with low gas permeability, based on the characteristics of low temperature, high pressure and fast gas analysis of hydraulic fracturing, hydraulic fracturing and permeability improvement experiments were carried out in low permeability coal seams. The experiment shows that the fracture development area is formed around the fracturing area, and the extraction effect of the fracturing area is improved significantly. The average moisture content of the coal seam is increased by 1.8 times, the single hole extraction concentration is increased by 3.12 times, and the extraction rate is increased by 40% to 50%. Due to the double effect of increasing crack development and water flooding, the extraction radius is increased from the original 3 m to 20 m. Hydraulic fracturing anti-reflection technology is safer and more efficient.

关 键 词：水力压裂 裂隙发育 瓦斯流动 含水率 水驱气 煤与瓦斯突出 

分 类 号：TD713[矿业工程—矿井通风与安全]