顶板砂岩含水三软破碎煤层小煤柱护巷技术研究林健

“”111231.1000132.1000343.024081、、、、、、、“”。388.9mm261mm7.5m/d。TD353A1006-6225201301-0043-04TechnologyofProtectingRoadwaywithSmallCoal-pillarinCrackedCoal-seamunderHydrousSandstoneRoofLINJian1FANMing-jian1HUBin1WANGHai-chun2TENGQing-shan31.CoalMining＆DesigningDepartmentTiandiScience＆TechnologyCo.Ltd.Beijing100013China2.Coal＆ChemicalManagementDepartmentChinaGuodianCorporationBeijing100034China3.FengshuigouCollieryInnerMongolianPingzhuangEnergyCo.Ltd.Chifeng024081ChinaAbstractThispaperindicatedthathydroussandstoneroofpoorconsolidationcrackedcoal-bodyatsmallpillarsidegobhydropsandstrongfloorswellingweremainfactorswhichresultinroadwayfailureonthebasisofgeologicaltestrockcompositionanalysisandundergroundanchoringtest.Somesupportingideasincludingself-loadedarchstrengtheningsurfacesupportingfull-lengthhighpre-stressanchoringsupportingandprotectingsystemmatchingandanchoringlayerselectionwereputforward.Applyingfull-lengthancho-ringboltandcablesuccessfullysupportedroadwayunderhydroussandstoneroofatsmallcoal-pillarsideincrackedcoal-seam.Duringminingperiodaveragesides’convergencewas388.9mmandroof’smaximumsubsidencewas261mmroadwaymaintenancewasal-mostavoidedaverageminingspeedreached7.5m/d.Keywordssoftcoal-seamwithsoftrockandsoftfloorsmallcoal-pillarhydroussandstoneroofhighpre-stressfull-lengthancho-ring2012－07－202010SKLGDUEK10071969－、。。5MPa。。1m1.5～2.0m、。、U+。。、、、、“”1。15－1A。421～435m。3418111020132CoalminingTechnologyVo1.18No.1SeriesNo.110February2013DOI:10.13532/j.cnki.cn11-3677/td.2013.01.0255－1A6～8m。5－1A5.6m4.45m4.5m。5－1A0～30.01～0.36m6～14°10°12.84kN/m3。5－1A。。5－1A、67200m320m3/h。22.122.1.15－1A5－1A。0～1.2m0.8m50mm。1.2～2.8m1.5m。2.8～21m。2.1.25－1AWQCZ－5610m10m1。1517.42MPa15MPa5～8MPa。2.1.3SYY－56。8.25MPaN37.3°W4.29MPa10.22MPa。2.2X5。567.8%38.65%530%9.3%538.5%26.56%535.5%18.11%。。。8%55。3、、。。5。5、。22mm1×1922mm2400mm。5.93×105mm3/min6000mm200kN24%。4000mm200kN100kN200kN441102013173kN129kN3。4“”1、。2“”。、4－5。3、、。14－6。4“”。、。5、、、。、。5、22。2。。、5－1A3.8m1.2m10.23m2。2265－1A。6.1335MPa222.4mM24150mm、、、。3。W。900mm11400N·m。6.222mm1194300mm。。300mm×300mm×16mm。1800mm31275mm200～250kN。5－1A3。35－1A790～100m。54“”2013175mm1.97%。140mm40mm。719mm1167mm5。40～50m。150.1mm261mm59mm。。850mm515mm1388.9mm427mm1052mm1213.4mm。4。485－1A、800mm1000mm。2586.8/m。2170/m416.701/m。91、、5－1A。2“”、、、。3“”。388.9mm261mm7.5m/d。4“”。1.M.2007.2.J.2007265929－933.3.J.2011161.4.J.200611659－62.5.J.201015445－62.6.J.2010294649－664.檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸檸2425s5s3s17s。4201271103、。1200t/h5.0Mt/a。5、、。。6411020131