1042023年第5期高瓦斯低透气性煤层水力压裂增透技术研究左文强（中煤科工集团重庆研究院有限公司，重庆400037）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0.68m3/min，减幅27%，水力压裂可有效提升煤层瓦斯抽采效率。关键词松软煤层；水力压裂增透；瓦斯抽采；裂隙发育中图分类号TD712+.6文献标识码Bdoi:10.3969/j.issn.1005-2801.2023.05.034ResearchonHydraulicFracturingandPermeabilityEnhancementTechnologyforHighGasandLowPermeabilityCoalSeamsZuoWenqiang(ChinaCoalScienceandEngineeringGroupChongqingResearchInstituteCo.,Ltd.,Chongqing400037)Abstract:InordertoimprovethepermeabilityofthesoftcoalseaminZhongxingCoalMineandeffectivelysolvethedifficultproblemoftraditionaldrillinggasdrainage,throughacombinationmathodofon-siteindustrialexperimentsandcomparisonofgasdrainageeffects,thehydraulicfracturingandpermeabilityenhancementtechnologyandprocessoftheNo.2softcoalseamarestudied.Theresultsshowthataftertheimplementationofhydraulicfracturingscheme,thepermeabilityofcoalseamsissignificantlyimproved,withgasdrainageconcentrationandflowrateincreasingby3.6and2.7timesrespectively.Theaveragereductionofairandgasdischargeamountintheextractionroadwayis0.68m3/min,adecreaseof27%.Hydraulicfracturingcaneffectivelyimprovetheefficiencyofcoalseamsgasdrainage.Keywords:softcoalseam;hydraulicfracturingandpermeabilityenhancement;gasdrainage;fissuredevelopment左文强：高瓦斯低透气性煤层水力压裂增透技术研究左文强：高瓦斯低透气性煤层水力压裂增透技术研究伴随矿井采深不断延伸，深部可采煤层所受地应力、瓦斯压力不断增强，煤岩渗透率减小，传统瓦斯抽采方法效果较差，衰减快、成孔护孔困难、抽采达标耗时长，严重制约矿井生产接替[1-2]。中兴煤矿主采的2号、4号煤层均为突出煤层，透气性系数为3.56~7.38m2/MPa2·d，透气性差。为解决传统钻孔瓦斯抽采难题，本文以中兴煤矿三采区西翼1#瓦斯底抽巷为研究对象，探究上覆2号煤层水力压裂...
