鉆孔預(yù)抽煤層瓦斯數(shù)值模擬及應(yīng)用.pdf

1、西安科技大學(xué)碩士學(xué)位論文鉆孔預(yù)抽煤層瓦斯數(shù)值模擬及應(yīng)用姓名：許雙泉申請學(xué)位級別：碩士專業(yè)：安全技術(shù)及工程指導(dǎo)教師：李樹剛@Subject：PreextractionCoalSeamGasDrillingofNumericalSimulationApplicationSpecialty：SafetyTechnologyEngineeringName：XuShuangquani（Signature）Instruct：LiShugang（Si

2、gnature）ABSTRACTGasdisastersthataffectthemajcoalmineproductionsafetyfactprepumpingcoalseamgasisasolutionofsuchaccidentsthemostfundamentalmosteffectivemeasures.Thisfluidinpousmediaaccdingtotheconservationofmasstodirection

3、aldrillingofcoalbodyaroundtheleveloflonggasflowfieldastheresearchobjecttheestablishmentofthebeholescoalgasseepagemodelanalysisofitsnumericalsolution.Applicationofelasticplasticmechanicsminingrockmechanicsdrillingaroundth

4、ecoalderivedmathematicalequationofthescopeofdestructiongetbedaroundthedamageradiusofcoalrelief.NumericalsimulationbyFLUENTsoftwaretoanalyzethedifferentextractiontimeextractionnegativepressurecoalpermeabilitygaspressuredr

5、illdiameterdrainageholeundertheconditionsoftheradiusvolumeofgasextractionareofvariousfactsondrillPrepumpingcoalseamgaswereinvestigated.AccdingtoShenhuaNingxiaCoalIndustryGroupBaijigoutheactualconditionsofcoalminescoalmin

6、egasdepositofthelawWkingFaceGasEmissionsRulesapplicationsaresubsourcepredictionofgasemissionface.Reasonablebasedonanalysisofcoalseamgasdrillingpumpingofthemainfactsexpectedtoestablishareasonableperiodofprepumpingmodelcom

7、binedwiththeprincipleofdirectionalhizontalbeholearrangementbereasonablyexpectedthatthecoalseamgasdrainageperiod.PracticethroughonsiteanalysisdirectionalhizontalbeholeeffectsacteristicsofCMMtoprovethatloweringthewkingface