2015333@126.com:,,,.[J].,2015,33(3):58-62.122231.7100542.7100543.66427100042U+IU+I50mTD325Adoidoi10.3981/j.issn.1000-7857.2015.03.009GasemissionlawinhighgasgoafoffullymechanizedcavingfaceAbstractAbstractInviewofthecharacteristicsofthecoalseamgasstorageandtheconditionsofthefullymechanizedcavingface,thenumericalsimulationandfieldmeasurementmethodsareusedtostudythedistributionofthegasconcentrationinspaceundertheconditionoftheU+Iventilationmode,andtherelationshipbetweenthegasemission,thecoalproductionandtheperiodicweightingisanalyzed.TheresultsofthenumericalsimulationshowthattheU+Iventilationmodecaneffectivelyreducethegasconcentrationintheuppercornerandthereturnairway.Withtheworkingfaceadvancing,thegasenrichmentzoneisconstantlyexpandedinthegoafback.Andthegasconcentrationrisesinthebackofthereturnairside.Therefore,itissuitabletoburythepipeinthereturnairsideofthegoafback.Theresultsoffieldmeasurementsshowthatthegasconcentrationdistributesgentlyfromtheinletsidetothemiddleofminingfaces,increasingfasterintherangeof50metersnearthereturnairside.Theabsoluteoutflowsofthegasandcoalproductionsareinanapproximatelinearrelationship,andthegasemissionseesperiodicchangesafterfirstweighting.Acomparisonstudyshowsthattheresultsofthedistributionofthegasconcentrationobtainedfromthenumericalsimulationandthefieldmeasurementsagreeverywell.Atthesametimeitisfeasibletoburythepipeinthereturnairsideofthegoafbacktodrainthehighconcentrationgas,anditcansignificantlyreducethegasemission.KeywordsKeywordsfullymechanizedcoalface;gasemission;fluentnumericalsimulationZHANGTianjun1,LIWei2,LIShugang2,SONGShuang2,TANGFeng31.SchoolofSciences,Xi'anUniversityofScienceandTechnology,Xi'an710054,China2.SchoolofEnergy,Xi'anUniversityofScienceandTechnology,Xi'an710054,China3.No.66427Troop,ChinesePeople'sLiberationArmy,Beijing100042,China582015333[1~3][3,4][5][6]80%[7][8]JYUJYFluentU+I13#6.13m3.5°1460m256.5m3mU+I35m2m2122.1[9]1[10]222m18m25115230m3151523m4m3.5m6m370m264m4m8m1velocityinlect1.4m/sO2φO221%φCH412%N22.2U+I210m280~100m18%592015333=10mFig.3Gasflowfieldatz=10meters4Fig.4Distributionofgasconcentrationinworkface5Fig.5Layoutofworkfacemeasuringpoints6Fig.6Distributionofgasconcentrationalongworkfacedirectionab34z=10m360%40.7%6%2.5%2.5%33.145m16ABCDEF5315m153.23.2.1650m602015333~10QqQ1Q2Q3q8910Q47Fig.7Distributionofgasconcentrationalongthedirectionperpendiculartothecoalwallab8Fig.8Relationshipbetweenabsolutegasemissionandcoalproduction10Fig.10Relationshipbetweengasemissionofworkfaceandcoalproduction3.2.27750m9Fig.9Relationshipbetweenrelativegasemissionandcoalproduction612015333~0.43%0.46%~0.74%0.64~0.7241U+I23References[1].[M].:,1992.YuQixiang.Minegaspreventionandcontrol[M].Xuzhou:ChinaUniversityofMiningandTechnologyPress,1992.[2].[M].:,2000.LiShugang.Movementofthesurroundingrockandgasdeliveryinfully-mechanizedtopcoalcaving[M].Xuzhou:ChinaUniversityofMiningandTechnologyPress,2000.[3],,.5343[J].,2012,42(1):22-24.LiShugang,XiaoPeng,LinHaifei.Analysisongasemissionlawinfullymechanizedcavingface5343ofwulancoalmine[J].SafetyinCoalMines,2012,42(1):22-24.[4],,.[J].,2004,23(21):3288-3291.LiShugang,LinHaifei,ChengLianhua.Relationbetweenabutmentpressureandrelievedgasdeliveryforfully-mechanizedtopcoalcaving[J].ChineseJournalofRockMechanicsandEngineering,2004,23(21):3288-3291.[5],,,.[J].,2003,31(11):11-14.QinYueping,ZhuJianfang,ChenYongquan,etal.Simulationtestandresearchongasmigrationlawingoafoffullymechanizedcoalcavingminingface[J].CoalScienceandTechnology,2003,31(11):11-14.[6],,.[J].,2011,36(3):407-411.JiangFuxing,KongLinghai,LiuChungang.Gasemissionlawsoffully-mechanizedsublevelcavingmininginextra-thickcoalseam[J].JournalofChinaCoalSociety,2011,36(3):407-411.[7],,.CFD[J].,2007,32(7):719-723.HuQianting,LiangYunpei,LiuJianzhong.CFDsimulationofgoafgasflowpatterns[J].JournalofChinaCoalSociety,2007,32(7):719-723.[8],.J[J].,2007,36(7):277-282.WangKai,WuWeiyang.Numericalsimulationofflowfieldandgastransportationingoafoffullymechanizedsub-levelcavingfacewithJ-shapeventilationsystem[J].JournalofChinaUniversityofMining&Technology,2007,36(7):277-282.[9],,,.Y[J].,2011,38(2):33-36.HeLei,YangShengqiang,BaoQingfeng,etal.ResearchonnumericalsimulationofstopegasmigrationlawundertheY-typeventilationmodeandanalysisofgascontrol[J].MiningSafety&EnvironmentalProtection,2011,38(2):33-36.[10].[D].:,2010.FanHongwei.Theresearchonnumericalsimulationofthegasmigrationrulesinthecavinggoaf[J].Taiyuan:TaiyuanUniversityofTechnology,2010.