裂隙岩体渗流应力耦合机制研究及突水数值模拟

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1、长江科学院硕士学位论文裂隙岩体渗流应力耦合机制研究及突水数值模拟姓名：孙玉杰申请学位级别：硕士专业：岩土工程指导教师：邬爱清;张宜虎20090601ABSTRACTWiththerapiddevelopmentofChina’ssocial-economy,large-scaledevelopmentofwaterresources,therapidexpansionoftherailwaytrafficandtheriseofthenuclearpowerindustry,therock-relatedmacro-engineeringareincreasingprog

2、ressively.Thewater-rockcouplingeffectofthefracturedrockmassesinthehighpressureandcomplicatedloadingisaverycomplicatedprocess.Thereforetheanalysisresearchofthegroundwater’sactivityaswellasthecouplinganalysisresearchofseepageandstressinfracturedrockmasseshasbecomeacommonconcerntothegeotechn

3、icalengineeringprofessionbutalsoaveryvaluedandcomplicatedtaskwithatheoreticalstudyandpracticalapplicationbackground.Thispaperadoptssuchmethodsastheoreticalanalysis,numericalsimulationandengineeringapplicationtoinvestigatetheseepagebehaviorinfracturedrockmasses,themechanicalpropertiesoffra

4、cturedrocksmassesafterexcavationaswellasthecouplingofstressfieldandseepagefieldinfracturedrockmassesroundlyandthoroughly.Basedontheexistingstudiesinthecorrelationalresearchbothathomeandabroad,themajorresultsareasfollows:1.Theexistingachievementsandresearchadvancesoftheseepagebehaviorofthe

5、fracturedrockmasses,themechanicalpropertiesoffracturedrockmassesafterunloadingaswellasthecouplingofstressfieldandseepagefieldinfracturedrockmassesandsuddeninflowofwateraresummarized.Theproblemsexistinginitatpresenthavebeenputforward.2.Theseepagetheoriesandmethodsofthefracturedrockmass,bas

6、ingonthedistinctelementmethodareexpatiated.UDECbasedontheDistinctElementMethodisusedtosimulatethefreesurfacefluid.3.Thefundamentalseepagetheoryofthefracturedrockmassesandthenetworksimulationofthestructuralplane,basedonMonte-Carlotechniqueareintroduced.DiscreteFractureNetworksaregeneratedt

7、hroughmyownprogram.BasedontheDFNmodel,theseepagefieldinfracturedrockmassesandthemechanicalpropertiesoffracturedrocksmassesafterexcavationarenumericallysimulatedbyUDEC.4.Thecouplingtheoryofstressfieldandseepagefieldinfracturedrockmassesareintroduced.Theroleoftheseepa