广昆铁路安禄隧道岩爆预测和防治研究

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1、西南交通大学硕士学位论文广昆铁路安禄隧道岩爆预测和防治研究姓名：姜来峰申请学位级别：硕士专业：地质工程指导教师：胡卸文;王茂靖20080501西南交通大学工程硕士学位论文第ll页AbstractTheANLUtunnel(DK993+173一DKl006+360)isthelongesttunnelfromZHUANGZHOUtoKUNMINGwithatotallengthof13187mandmaximumdepthof565m．thegeologicalconditionsaremorecomplicated，rockburstofth

2、etunnelisthemainengineeringgeologicalproblems．Inthispapegincloseconnectionwithpractic'eoftheANLUtunnelproject，andonthemainlineoftherockburst，theproblemsareelaboratedindetml．Thisstudycontentsandtheconclusionsaremainlyincludethefollowing：(1)Makinguseofsomemeasuremethodsoffiel

3、dsuchasdraulicfracturingmethod，thegeostressstatusintheengineeringrockmasshasbeenascertainedandthesystematicrecognitionofthegeostressfieldintheareahasbeenattained：thecurrentstateofgeostressfieldinthesurveyedareaismainlysqueezedfromthedirectionofNWandmaximumprincipalgeostress

4、directionsaregenerallyN46．7o一50．7。W：(2)Accordingtodetailedanalysisofthetwoboreholetestresults，currenttectonicgeostressismainlydominatedintheengineeringareaandwhat’Smoreitsintensityisverystronger’therelationshipofthethreemainstressisshowed：品>瓯>鼠(3)AccordingtOthetestresults，t

5、hemaximumprincipalstressvalueintunnelbodyoftheengineeringareaisabout17Mpa一20Mpa,theMinimumprincipalstressvalueaboutlOMpa—l2Mpa．Accordingtosurveyresultsanalysis，thecurrenttectonicgeostressoftheengineeringareaisrelativelystrong，SOinthetunnelexcavationprocess，possibilitiesofro

6、ckburstdisastercannotberuledout．Itisproposedthatdeep-lyingtunnelsof350～450mdeptharemadedesigninrelativehighergeostress，tunnelsofmorethan450mdepthdesigninthehigheststress．(4)Accordingtodetailedanalysisofresultsofuniaxialcompressiontest，rockburstpronenessindextestandtriaxialu

7、nloadingtesting，rockburstsmayoccurwiththemechanicalpropertiesoflithologyandstrengthinANLUtunnelsurroundingrockduringthetunnelexcavationprocess(5)Basedonanalysisesoffieldgeostressandrockmechanicstestresults，it’Sshowedmiddle-intensityorhighrockburstwilloccurredduringthetunnel

8、excavationprocess．Keywords：tunnel，rockburst，draulicfracturingmethod，uniaxialcompre