ZhouAitao, ZhangMeng, WangKai, TaoBo. Research on gas migration law and gas drainage parameters optimization in goaf of fully mechanized caving face in Buertai Coal Mine[J]. Journal of Mining Science and Technology, 2020, 5(3): 291-301.
Citation:
ZhouAitao, ZhangMeng, WangKai, TaoBo. Research on gas migration law and gas drainage parameters optimization in goaf of fully mechanized caving face in Buertai Coal Mine[J]. Journal of Mining Science and Technology, 2020, 5(3): 291-301.
ZhouAitao, ZhangMeng, WangKai, TaoBo. Research on gas migration law and gas drainage parameters optimization in goaf of fully mechanized caving face in Buertai Coal Mine[J]. Journal of Mining Science and Technology, 2020, 5(3): 291-301.
Citation:
ZhouAitao, ZhangMeng, WangKai, TaoBo. Research on gas migration law and gas drainage parameters optimization in goaf of fully mechanized caving face in Buertai Coal Mine[J]. Journal of Mining Science and Technology, 2020, 5(3): 291-301.
Gasemissionfromthegoafisoneoftheimportantsourcesofgasintheworkingfaceanda reasonable goaf drainage scheme can effectively solve the problem of gas overrun in working face.Combinedwithnumericalsimulationandfieldapplication,thegasintubationextractionsystemin thegobofthefullymechanizedcavingfacein42-topcoalseamofBuertaiCoalMineisoptimizedin thispaper.Firstly,theFLUENTfluidsimulationsoftwareisutilizedtosimulatethecharacteristicsofgas migrationinthestope,consideringthedesorptionoftheremainingcoalinthegoafandthegasemission fromtheupperadjacentlayer.Thedistributionlawsofgasconcentrationinthegoafarerevealed,and theinfluenceofthedistancebetweentheextractionoutletandtheair-returncorner,drainagenegative pressureandairsupplyratioontheextractioneffectareanalyzed,theoptimizedschemeofextractionis proposedaccordingly.Thentheoptimizationschemeisappliedonthespot,focusingonthedistancebetweentheextractionoutletandtheair-returncornerandnegativepressure.Itisconcludedthatwhenthe intubationdistanceis70mandnegativepressureis12~18kPa,theextractioneffectisbetter.Theresearchresultshavetheoreticalandpracticalsignificancefortheoptimizationofgasdrainageschemein goafofhighyield,highefficiencyandlowgasmines.