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厚煤层放顶煤开采中放煤方式的选取模拟分析
Title:Simulationanalysisofcoaldischargemethodsforthickcoalseamtopcoalcaving
Introduction:
Intheminingindustry,theextractionofcoalfromthickcoalseamspresentsnumerouschallenges.Ofparticularinterestistheselectionofcoaldischargemethodsfortopcoalcaving,whichinvolvesthecontrolledextractionoftheupperportionofthecoalseam.Thispaperaimstoconductasimulationanalysistoevaluateandcomparedifferentcoaldischargemethodsforthickcoalseamtopcoalcaving.
1.Background:
1.1Thickcoalseammining:
Thickcoalseamsarecharacterizedbycoalseamswithathicknessexceeding8meters.Theextractionofcoalfromsuchseamsposesseveralchallenges,includinggeotechnicalcomplexitiesandsafetyrisks.
1.2Topcoalcaving:
Topcoalcavingisawidelyusedmethodinthickcoalseammining,wherethecoalisextractedfromtheupperpartoftheseamthroughcontrolledcaving.Itisknownforitshighrecoveryrateandefficientextraction.
2.Coaldischargemethods:
2.1Traditionalgravityflow:
Traditionally,gravityflowhasbeentheprimarymethodfordischargingcoalfromthegoafduringtopcoalcaving.Thismethodreliesonthenaturalslopeofthegoafforthecoaltoflowdownandbetransportedtothebottomofthemine.
2.2Hydraulictransportation:
Inrecentyears,hydraulictransportationhasgainedpopularityasanalternativecoaldischargemethod.Thismethodinvolvespumpingwaterintothegoaftocreateaslurrywiththecoalparticles,whichisthentransportedthroughpipestotheexitpoint.
2.3Pneumatictransportation:
Pneumatictransportationoperatessimilarlytohydraulictransportationbutusesairinsteadofwater.Thecoalparticlesaresuspendedintheairandtransportedthroughpipestothesurface.
3.Simulationanalysismethodology:
3.1Datacollection:
Geologicaldata,includingcoalseamthickness,angleofinclination,andcoalpropertydata,arecollectedforthesimulationanalysis.Thisdataiscrucialincapturingthereal-worldcomplexitiesofthickcoalseammining.
3.2Modeldevelopment:
Acomputer-basedsimulationmodelisdevelopedusingadvancedsoftware.Themodelincorporatestheselectedcoaldischargemethods,aswellasvariousparameterssuchascoalparticlesizedistribution,w