江西煤炭科技2023年第1期摘要:龙泉煤业4205工作面回采巷道采用沿底留顶煤布置方式;为保障其围岩稳定性,以该工作面4205主运顺槽为研究背景,拟运用数值模拟、理论分析、矿压监测等方法,探究巷道顶煤厚度对其围岩变形破坏情况的影响;以原锚网索支护方案为基础拟定高强度、高预应力支护系统;掘巷阶段巷道表面变形微小,该支护系统有效抑制了围岩的变形破坏。关键词:大断面巷道;留顶煤掘进;支护技术;数值模拟;理论分析中图分类号:TD263.5+3;TD353文献标识码:B文章编号:1006-2572(2023)01-0106-04StudyonLargeSectionCoalRoofRoadwaySupportinThickSeaminLongquanCoalIndustryHaoRuiqiang(TaiyuanCoalGasificationLongquanEnergyDevelopmentCo.,Ltd.,Loufan,Shanxi030300)Abstract:Thestopingroadwayof4205workingfaceofLongquanCoalIndustryadoptsthelayoutofalongbottomcoalroof.Toensurethestabilityofthesurroundingrock,taking4205mainhaulagegateoftheworkingfaceastheresearchbackground,thepaperproposestousenumericalsimulation,theoreticalanalysis,rockpressuremonitoringandothermethodstoexploretheinfluenceofroadwaytopcoalthicknessonitssurroundingrockdeformationandfailure,andformulateshighstrengthandhighprestresssupportsystembasedontheoriginalanchormeshcablesupportscheme,whoseapplicationmakestheroadwaysurfacedeformationsmall,andeffectivelyinhibitsthedeformationandfailureofsurroundingrock.Keywords:largesectionroadway;coalroofexcavation;supporttechnology;numericalsimulation;theoreticalanalysis龙泉煤业厚煤层大断面留顶煤巷道支护探讨郝瑞强(太原煤气化龙泉能源发展有限公司,山西娄烦030300)1工程概况龙泉矿井位于山西省太原市娄烦县境内,井田面积35.23km2,建设规模为5.0Mt/a。井田内主要开采4#、7#、9#煤层。目前矿井所采煤层为4号煤层,平均厚度为6.8m。4205工作面(以下简称工作面)割煤高度3.5m,放煤高度2.7~3.9m,采放比1∶0.94,循环进度0.865m。工作面北侧为已回采的4203工作面,南侧为未布置的4111工作面,西侧为南大巷,东侧为井田边界,如图1所示,但工作面主运顺槽距离4203工作面的采空区较远,已经远远超出了侧向支承压力的影响范围。同时,工作面辅运顺槽下部没有布置任何工作面,工作面主运和辅运顺槽均属于实体煤巷。两顺槽开口至工作面停采线段采用沿顶留底煤...