第32卷增刊12023年6月文章编号:1004-4051(2023)S1-0309-04中国矿业CHINAMININGMAGAZINED0I:10.12075/j.issn.1004-4051.20230370Vol.32,Suppl1June2023近距离煤层开采过上覆采空区影响分析卞涛",刘建宇²,张顺1(1.国能神东煤炭集团有限责任公司补连塔煤矿,内蒙古鄂尔多斯017209;2.国能神东煤炭集团有限责任公司上湾煤矿,内蒙古鄂尔多斯017209)摘要:为了解近距离煤层过上覆采空区顶板位移应力变化情况,以补连塔煤矿12415综采工作面过上覆11401采空区为研究对象,采用FLAC3D数值模拟及理论计算分析12415综采工作面过上覆11401采空区对底板破坏深度计算及开采下位煤层顶板应力分布分析。研究结果表明:理论计算得出11#采空区底板破坏深度为2.93m;受采空区影响,12#煤层水平范围为10.73m,通过FLAC3D数值模拟软件模拟下位12415工作面开采经过上位11401工作面采空区,得出受上位煤层遗留煤柱影响的顶板应力集中系数最大仅为4.1,最大垂直应力为20.2MPa。关键词:近距离煤层;采空区;数值模拟;应力状态;垂直应力中图分类号:TD353Analysisoftheimpactofclosedistancecoalseamminingonoverlyinggoaf(1.BuliantaCoalMine,CHNEnergyShendongCoalGroupCo.,Ltd.,Erdos017209,China;2.ShangwanCoalMine,CHNEnergyShendongCoalGroupCo.,Ltd.,Erdos017209,China)Abstract:Inordertounderstandthedisplacementandstresschangesoftheroofoftheoverlyinggoafincloserangecoalseams,takesthe12415workingfaceofBuliantaCoalmineastheresearchobject.TheoreticalcalculationandFLAC3Dnumericalsimulationarerespectivelyusedtoanalyzethecalculationofthefailuredepthoftheuppergoaftothefloorandthestressdistributionoftheroofinthelowerminingposition.TheresultsshowthatthefailuredepthoffloorinNo.1lgoafis2.93m.ThehorizontalrangeofNo.12coalseamis10.73m.FLAC3Dnumericalsimulationsoftwareisusedtosimulatetheminingofthelower12415workingfacethroughtheupper11401workingfacegoaf,andthemaximumstressconcentrationcoefficientoftheroofaffectedbytheuppercoalpillarisonly4.1,andthemaximumverticalstressis20.2MPa.Keywords:nearcoalseam;mined-outarea;numericalsimulation;stressstate;verticalstress我国近距离煤层赋存和开采所占比重很大,随着煤炭工业快速发展,当前大部分矿区近距离煤层上部煤层已经回采完毕,现阶段大部分回采深...