長大引水隧洞巖爆機理分析及防治研究.pdf

1、河海大學碩士學位論文長大引水隧洞巖爆機理分析及防治研究姓名：朱江棚申請學位級別：碩士專業(yè)：防災減災工程及防護工程指導教師：朱珍德20070601AbstractAbstractUndergroundengineeringwillbehighlydevelopedinthe21stcenturySometunnelswillbedesignedandconstructedinde印stratahighstressfieldandunder

2、theseawhichprovidevastspaceforrockburstwhichisoneoftheworstgeologycalamitiesintunnelconstructionintheworldOncerockbursterupteditcandamageequipmentsintheroomofhydroelectricstationtraffictunnelandmininggalleryRockburstwill

3、threatenengineers’personalsecurityTherefore，strengtheningthediscussofthemechanism，forecastandpreventionofrockburstnotonlyCanpromotethedevelopmentofgeologycalamitybutalsohavebenefitstothesocietyandeconomyTIlisthesismainly

4、discussesmarblesurroundingrockofindiversiontunneloftheJinpinghydroelectricstation豇lepaperanalysestheinfluencingfactormechanismandnumericalcalculationmethodofrockburstChiefworkandconclusionsaresummarizedasthefollowing：(1)

5、mpaperdiscussestheinfluencingfactorstoprobabilityofrockburst，suchasgroundstresslithologiccharacters，rockmassstructure，embeddeddepthetcInfluencingfactorsalereducedtotwotypes：stressstateofrockandlithologiccharacterofrock(2

6、)Destructivemechanicscharactersofrockareanalyzedbynormaltfiaxialunloadingexperimentsunderdifferentunloadingmodesneresultsindicatethatunloadingexperimentsareaccordwiththeacmalstressstateofrockburst111epaperkeepseyesonmacr

7、odestructivecharactersunderunloadingexperimentsofkeepingaxisstressincreasingn地brokennicksarescannedbyelectronicmicroscopeandthemicrocosmiccharactersareanalyzedThenmechanismofrockburstiseduced(3)Settingoutfromthepointofvi

8、ewonnumericalanalysis，calculativeelementsofrockburstarediscussedbyusingfiniteelementtechniquenepaperalsoadvancesthecalculativemethodofconsideringeffectofexcavationoftunnel1rt培stressofexcavatingroundtunneliscalculatedTheo

9、reticalresultsareusedtocontrastitwhichindicatesthatconsideringeffectofexcavationoftunnelCanreflecttheinstanceofstresscollectingoftunnelsufficientlyandthecalculationofsimulatingexcavationCanreflecttheactualstressdistribut

10、ionofsurroundingrockofthetunnelOnthesi，deofforecastingtheintensitydepthandwidthofrockburstthismethodofcalculationprovidesdegreeofaccuracywhichisbetterthanothersKeyWords：rockburst，marble，unloadingexperiments，mechanism，fin