水力冲孔对松软煤层回采巷道煤帮变形影响性研究*惠钰博1，郑玉晶2，赵龙刚3，刘建康3，张盛1，邵林3，王帅宾3（1.河南理工大学能源科学与工程学院，河南焦作454000；2.河南煤业化工集团焦煤集团九里山矿,河南焦作454005；3.河南永锦能源有限公司云盖山煤矿二矿，河南禹州461670）摘要：采用水力冲孔技术在治理煤层瓦斯的同时，对回采巷道松软煤层的稳定性存在影响，分析了云盖山二矿23304工作面运输顺槽受水力冲孔抽采瓦斯过程中对煤帮变形的影响因素，采用FLAC数值模拟方法研究了冲孔造成孔洞和煤体受水湿润对煤巷围岩变形的影响规律。结果表明，水力冲孔形成的孔洞对煤巷周围有一定卸压作用，但同时会降低煤体强度，再加上煤体受浸水湿润，煤帮容易形成较大变形。巷帮煤体位移与冲煤量符合非线性正函数关系，与钻孔布置间距符合非线性负函数关系，对于煤层实施水力冲孔抽采瓦斯后煤巷变形及围岩控制有一定的参考价值。关键词：水力冲孔；松软煤层；煤帮变形；围岩控制中图分类号：TD325文献标志码：A文章编号：1008－8725（2023）02－039－05StudyonInfluenceofHydraulicFlushingonCoalSideDeformationinMiningRoadwayofSoftCoalSeamHUIYubo1,ZHENGYujing2,ZHAOLonggang3,LIUJiankang3,ZHANGSheng1,SHAOLin3,WANGShuaibin3(1.SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo454000,China；2.JiulishanMine,HenanCoalChemicalIndustryGroupCokingCoalGroup,Jiaozuo454005,China；3.No.2MineofYungaishanCoalMine,HenanYongjinEnergyCo.,Ltd.,Yuzhou461670,China)Abstract：Ithasinfluenceonthestabilityofsoftcoalseaminminingroadwaywhiletreatingcoalseamgaswithhydraulicflushingtechnology.Theinfluencingfactorsofcoalsidedeformationintheprocessofhydraulicflushinggasextractionin23304workingfaceinNo.2mineofYungaishancoalminewereanalyzed.FLACnumericalsimulationmethodwasusedtostudytheinfluenceofholescausedbyhydraulicflushingandcoalwettingonsurroundingrockdeformationofcoalroadway.Theresultsshowthattheholeformedbyhydraulicflushinghasacertainpressurereliefeffectaroundthecoalroadway.However,whenthecoalstrengthisreducedandthecoalissoakedandwet,thecoalwalliseasytoformlargedeformation.Inaddition,thedisplacementofroadwaywallisinlinewiththenon-linearpositivefunctionrelationw...
