_采空区瓦斯抽采技术与浮煤自燃耦合治理研究

4510Vol.45No.10201710CoalScienceandTechnologyOct．201712231.1001012.1230003.123000、、、。、6m4.12%。19.18～20.57m3/min10.16～11.32m3/min。、48205。TD712TD75A0253－2336201710－0111－06StudyongoafgasdrainagetechnologyandfloatcoalspontaneouscombustioncouplingcontrolZHAOQi1WANGXuefeng2HUANGGe2WANGYansheng31.ChinaCoalSocietyBeijing100101China2.CollegeofSafetyScienceandEngineeringLiaoningTechnicalUniversityFuxin123000China3.CollegeofMiningLiaoningTechnicalUniversityFuxin123000ChinaAbstractInordertosolvethecouplinggovernanceproblemofcoalspontaneouscombustionandgasoverruningobofXimingcoalmineaheterogeneousporousmedia3Dmodelandsimulationwereappliedtosetupthecomprehensivefirepreventionandcontroltechnicalplanandtoconductthesitemonitoringandmeasuringwiththemeasuresofthehighlevelgasdrainagegatewayandincomparisonwiththechangeconditionsoftheairvelocityflowfieldgasconcentrationfieldandoxygenconcentrationfieldinthegoafbeforeandafterthetwosidesoftheairintakeandairretuninggatewayssealedinthegoaf．Theresultsshowedthatthegasdrainagemethodwiththehighlevelgasdrainagegatewaywasappliedtosealtheairretuninggatewayandthetransportationgatewayandthustheairleakageofthecoalminingfacetothegoafwasreduced．Thewidthofoxidizedstripwasreducedby6mthegasdrainagevolumefactionofthehighleveldrainagegatewaywasincreasedby4．12%andthegasdrainageefficiencywasimproved．Thesitemonitoringandmeasuringshowedthatthegasdrainageflowvolumeofthehighlevelgasdrainagegatewaywas19．18～20．57m3/minthegasdrainageflowvolumewiththepipeburiedatthetopcornerwas10．16～11．32m3/minandthusgreatgasemissionfromthegoafandthegasoverlimitphenomenonatthetopcornerwereeliminated．WiththeimplementationoftheinhibitoragentsprayednitrogeninjectionandothermeasurestheoxidationphenomenonofthecoalleftinthegoafofNo．48205coalminingfacewaseffectivelycontrolledandthesafetyproductionofthecoalminingfacewasen-sured．Keywordsgasdrainagecoalspontaneouscombustionhighlevelgasdrainagegatewayoxidizedstrip2017－05－06DOI10.13199/j.cnki.cst.2017.10.019512741131987—。[e-mail]chnologyandfloatcoalspontaneouscombustioncouplingcontrolJ．CoalScienceandTechnology20174510111－116.11120171045070%。12Fluent3－45－67－9—10－12、13－16。17。18CFD、。19－20“S”。Fluent、、、。148205320m。389m83m15.6t。4044t/d。86°3.84m。、4.0m×3.5m5.0m×3.5m。0.3m35m3/min12.6m3/t17.54%Ⅱ。“U”2598m3/min。22.1482051。5m×4m7m×4m。150m83m60m。838m27m3.2m×3.4m。102.5m5～95m。5m2200～100m42°21°113mm。。148205Fig.1GasextractiongeometrymodelofNo.48205facegoafICEM。2112017102.22589m3/min30m3/min、、、2—4。2Fig.2Contrastofwindvelocityfieldingoaf3Fig.3Contrastofgasdensityfieldingoaf、。1。2589m3/minZ=0.5m5。1Table1Gasextractionparameterscontrastofhighdrainageroadwaybeforeandaftersealing/m3·min－13030/%25.9630.08/m3·min－17.8039.024/%1.810.674Fig.4Contrastofoxygendensityfieldingoaf5Z=0.5mFig.5OxidationzonedistributionchangesofZ=0.5horizontalplaneingoafbeforeandaftersealing311201710455。14～57m22～60m5m4～51m13～50m10m0～54m0～48m6m。、。30m3/minZ=25m6。6Z=25mFig.6OxygendensityfieldandwindvelocityfielddistributionchangesofZ=25mhorizontalplaneingoafbeforeandaftersealing6Z=25m7%19%16%0.001m/s。Z=25m7%2。2Z=25m7%50m36m30%。2Z=25mTable2InfluenceoftworoadwaysealingoaftohighoxygenareaoftheuppercoalseamZ=25mhorizontalplane7%/m/m9747－509973－368803。。、。3.1482057—8。748205Fig.7ＲelationshipofextractiondensityaboutNo.48205highdrainageroadwayandworkingfaceadvancingdistance848205Fig.8ＲelationshipofextractionflowaboutNo.48205highdrainageroadwayandworkingfaceadvancingdistance41120171045～106m17.6%～21.2%13.59m3/min19.18～20.57m3/min。7.49%～9.67%10.16～11.32m3/min。482053。348205Table3GasdensitymonitoringdataofuppercornerandreturnairwayofNo.48205workingface/m455061687393106/%0.370.350.290.410.220.270.30/%0.170.160.100.260.150.170.193.248205O2、N2、CO9。48205O218%。O2。N290%9a、9b。CO9c。CO。CO0.01%。1d1CO1CO11CO。3CO。8d3COCO0CO。9O2、N2、COFig.9MonitoringcurvesofO2、N2、COdensity4148205Fluent、、“”。217.6%～21.2%19.18～20.57m3/min7.49%～9.67%10.16～11.32m3/min。。3、、。Ｒeferences1．J．2005306733－736．ZHANGXinhaiXIGuangCHENXiaokunetal．DeterminingspontaneouscombustiondangerzonesandpredictingspontaneouscombustionduringminingnearneighboredcoalseamsJ．Journal51120171045ofChinaCoalSociety2005306733－736．2．“”J．200626115－1992．ZHUYiDENGJunZHANGXinhaietal．Distributionofsponta-neouscombustion”threezone”infullymechanizedgobundertheconditionsofgasdrainageJ．JournalofXi’anUniversityofSci-enceandTechnology200626115－1992．3．J．200227154－58．WENHu．Dynamicnumericsimulationofcoalself－igniteingoafinfullymechanizedcavingfaceJ．JournalofChinaCoalSociety200227154－58．4．J．2016364457－462．LIUZhenlingWENHuLIUJieetal．Parametricresearchofthecoordinationpreventiontechnologyofmethaneandcoalself－heat-ingingoafofclosedistancecoalseamsJ．JournalofXi’anUni-versityofScienceandTechnology2016364457－462．5．D．2013．6．J．2013441178－184．KONGYifanCAOKaiWANGShuailing．IgnitionsourceanalysisofgasburningaccidentforhighgasseamwithlowspontaneouscombustiontendencyJ．SafetyinCoalMines2013441178－184．7．“O”J．2012373484－489．LIZongxiangYIGangWUJianguoetal．Stu