铁路瓦斯隧道分类与煤与瓦斯突出预测方法分析

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1、万方数据西南交通大学硕士学位论文第1I页AbstractCurrently,theamountofgastunnelthroughthecoalformationinsouthwestChinaisgraduallyincreasing，andmostlylargesectiontunnelsaretwo-lanehigh—speedpassengerrail，whichgreatlyimprovedthedifficultyofconstruction．Buttheclassifiedmethodofgastunnelfr

2、om((Technicalcodeforrailwaytunnel埘tllgas))(TB10120-2002)isrelativelysimple，whichignoredthefactorsofsectionsize．Thepredictiontechniquesofcoalandgasejectionmostlylearnedfromthecoalindustry,thesetechnologiesaretime—consuming，andtheaccuracyofthemeasuredindicatorsisnoth

3、igh．Inviewofthis，thestudyofclassificationandcoalandgasoutburstpredictiontechnologyfortunnel、析ttlgasisverynecessary．Onthebasisofdomesticandinternationalresearch，themainresearchofthispaperandtheresultstakenasfollows：(1)Onthebasisofdomesticandinternationalresearchandt

4、heconstructionexperiencefortunnelwithgas，anewgasTunnelclassificationispresentedinthispaperbyanalyzingthemainfactorsofgasconcen仃ation，tunnelventilation，tunnelsectionareaandothermainfactors，、whichsuitableforavarietyofcommontunnel谢tIlgas．(2)Thegradeofrailwaygastunneli

5、sdeterminedbythehighestlevelofworkareaintunnel．ForclassIsection(40-80mz)，theboundaryvalueis0．1m’／minbetweenmicroandlowgasworkareaintunnel，andtheboundaryvalueis0．7m’／minbetweenlowandhighgasworkareaintunnel；forclassIIsection(80-120m2)，theboundaryvalueare0．3m’／minand1

6、．4m3／minrespectively；forclass11Isection(120-160m2)，theboundaryvalueare0．5m3／minand2．1m3／minrespectively；forclassIVsection(>_160m2)'theboundaryvalueare0．7m3／minand2．8m’／minrespectively；Theworkareaingastunnelisjudgedascoalandgasejectionworkareaaslongashereisaejection

7、dangerinthearea．(3)Accordingtothestudyonthemechanismofcoalandgasejection，sixkeyfactorssuchasgaspressure，geologicalstructure，coalstructuretype，coalmassstrength，initialspeedofmethanediffusionandverticaldepthwereselectedasthejudgingindexesofcoalandgasejection．ThentheB

8、Pneuralnetworkmodelforthepredictionofcoalandgasejectionisestablished，whichinvolves6inputnodes，11hiddennodesandtwooutputnodes．25setsoftypicalcoald