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大宝鼎4号煤层露头火灾的数值模拟及应用的中期报告.docx

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大宝鼎4号煤层露头火灾的数值模拟及应用的中期报告 Abstract: Thisreportpresentsthemid-termresultsofthenumericalsimulationandapplicationoffireintheexposedcoalseamofNo.4Dawding.Themainfocusofthesimulationistoinvestigatethemechanismofthefirespreadanddevelopeffectivestrategiestocontrolandextinguishthefire. Introduction: TheNo.4Dawdingcoalseamisexposedtothesurface,makingitvulnerabletofiresandotherhazards.Thecurrentfireinthecoalseamhasbeenburningforseveralmonthsandposesaseriousthreattothesafetyofworkersandtheenvironment.Theuseofnumericalsimulationtounderstandthefirebehavioranddevelopeffectivecontrolstrategiesisessentialtoensurethesafetyofworkersandminimizethedamagetotheenvironment. Methodology: ThenumericalsimulationwasconductedusingtheFireDynamicsSimulator(FDS)software,whichsimulatesthephysicsoffirespreadandcombustion.Thesimulationmodelofthecoalseamwasconstructedbasedonfielddataandliteraturereview.Thecombustioncharacteristicsofthecoalweredeterminedthroughexperimentalresearch.Thesimulationwasvalidatedthroughcomparisonwithfieldobservations. Results: Thesimulationresultsshowthatthefireinthecoalseamisfueledbythecombustiblegasesreleasedfromthecoalandtheoxygenintheair.Thefirehasspreadhorizontallyandverticallythroughthecoalseam,creatingacomplexburningpattern.Thesimulationalsorevealsthatthetemperatureinthecoalseamcanreachupto1000°C,whichposesasignificantrisktothesafetyofworkers. Application: Thesimulationresultshavebeenusedtodevelopeffectivecontrolstrategiestoextinguishthefire.Thestrategiesincludesealingthecoalseamtolimittheoxygensupply,injectinginertgasestosuppressthecombustion,andusingwatermisttolowerthetemperature.Theimplementationofthesestrategieshasbeensuccessfulinreducingthespreadofthefireandloweringthetemperatureinthecoalseam. Conclusion: Thenumericalsimulationprovidesvaluableinsightsintothemechanismofthefireinthecoalseamandisessentialtodevelopeffectivecontrolstrategies.Themid-termresultsofthesimulationhavebeenusedtoimplementcontrolstrategiesthathavebeensuccessfulinreducingthespreadofthefireandlow