江西煤炭科技2023年第1期摘要：为避免回采12511工作面时，12511低抽巷和12513轨道巷发生破坏，采用“补强锚索支护+密集钻孔”弱化顶板技术措施，即以12511低抽巷19#高程点为分界点，分段提出12511低抽巷补强支护和12511轨道巷密集钻孔技术，并对密集钻孔进行单轴抗压原位测试，发现卸压钻孔围岩单轴抗压强度降低较为明显，最大降幅为7.5MPa，平均下降3.2MPa，表明密集钻孔切顶卸压可以很好地维护巷道围岩的稳定性。关键词：巷道支护；补强锚索；密集钻孔；切顶卸压中图分类号：TD322+.5；TD353+.6文献标识码：B文章编号：1006-2572（2023）01-0025-03ApplicationofIntensiveDrillingPressureReliefRoadwayProtectionTechnologyin12511TrackEntryJiangZe(DongquCollieryofShanxiCokingCoalGroupCo.,Ltd.,Taiyuan,Shanxi030000)Abstract:Toavoidthedamageof12511lowlevelsuctionroadwayand12513trackroadwaywhenminingat12511workingface,thetechnicalmeasuresof"supplementsupportandintensivedrilling"areadoptedtoweakentheroof,thatis,takingNo.19elevationpointof12511lowlevelsuctionroadwayasthedividingpoint,thesupplementsupportof12511lowlevelsuctionroadwayandtheintensivedrillingtechnologyof12511trackroadwayareproposedinsections,andtheuniaxialcompressiveoftheintensivedrillingistestedinsitu,whichshowsthattheuniaxialcompressivestrengthofthesurroundingrockofthepressurereliefdrillingissignificantlyreduced,themaximumreductionis7.5MPa,andtheaveragereductionis3.2MPa,andprovesthatthestabilityofsurroundingrockofroadwaycanbewellmaintainedbytheroofcuttingpressurereliefwithintensivedrilling.Keywords:roadwaysupport;supplementsupportanchor;intensivedrilling;roofcuttingpressurerelief12511轨道顺槽密集钻孔卸压护巷技术应用姜泽（山西焦煤集团有限责任公司东曲煤矿，山西太原030000）坚硬顶板的煤层在工作面回采过程中会出现悬顶时间长、巷道应力集中程度高等现象，容易造成巷道和支护体失稳破坏［1］。因此，需采取一定的弱化顶板技术［2］改变工作面回采后的顶板岩层破断结构特征，优化工作面回采引起的侧向支承压力和底板支承压力分布规律。煤矿常用的弱化顶板技术主要有水力压裂切顶卸压、深孔爆破切顶卸压以及密集钻孔卸压等技术［3］，其中爆破切顶与水力压裂切顶技术工艺相对复杂［4］，而密集...
