薄煤层高瓦斯矿井近距离煤层开采沿空留巷技术研究应用钮长松（国家乌海能源黄白茨矿业有限责任公司，内蒙古乌海016000）摘要：针对黄白茨煤矿采掘接续紧张、煤炭采出率低等问题，在黄白茨煤矿0213上201工作面应用柔模混凝土沿空留巷开采技术。考虑0213上201工作面上覆12煤采空区的影响，通过现场调研、理论计算、数值模拟和现场实际相结合的方法，重点设计研究了在上覆近距离煤层采空区影响下，沿空留巷巷旁支护体宽度对留巷巷道的影响。通过数值模拟及实际应用表明：黄白茨煤矿0213上201工作面随着巷旁支护体宽度增大，巷旁支护体受上覆岩层垂直应力处于先减小后稳定趋势，同时巷道顶板应力、副帮水平应力都处于先减小后稳定趋势；通过理论计算所确定的巷旁支护体宽度为1.0m，强度C30，在实际应用中，满足留巷要求，留巷效果良好。关键词：高瓦斯；沿空留巷；数值模拟；巷旁支护中图分类号：TD353文献标志码：A文章编号：1008－8725（2023）03－069－05ResearchandApplicationofGob-sideEntryRetainingTechnologyinCloseDistanceCoalSeamMininginThinCoalSeamandHighGasMineNIUChangsong(NationalWuhaiEnergyHuangbaiciMiningCo.,Ltd.,Wuhai016000,China)Abstract：InviewoftheproblemsoftenseminingconnectionandlowcoalrecoveryrateinHuangbaicicoalmine,thesoftmodelconcretegob-sideentryretainingminingtechnologywasappliedin0213up201workingfaceofHuangbaicicoalmine.Consideringtheinfluenceof12coalseamgoafon0213up201workingface,throughfieldinvestigation,theoreticalcalculation,numericalsimulationandfieldpractice,focusesonthedesignandresearchoftheinfluenceofthewidthofthesupportingbodynearthegob-sideentryretainingroadwayonthegob-sideentryretainingroadwayundertheinfluenceofthegoafoftheclosedistancecoalseam.Numericalsimulationandpracticalapplicationshowthat:withtheincreaseofthewidthoftheroadsidesupport,theverticalstressoftheroadsidesupportsubjectedtotheoverlyingstrataat0213up201workingfaceinHuangbaicicoalminedecreasesfirstandthenstabilizes,whilethestressoftheroadwayroofandthehorizontalstressoftheauxiliarywalldecreasefirstandthenstabilizes;throughtheoreticalcalculation,thewidthofroadwaysupportbodyis1.0mandthestrengthC30isdetermined.Inpracticalapplication,itmeetsthereq...
