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1、重庆大学硕士学位论文穿煤系地层大跨度隧道围岩稳定性研究姓名：何正申请学位级别：硕士专业：安全技术与工程指导教师：李晓红20070607重庆大学硕士学位论文中文摘要⑦隧道附近的煤系地层，特别是采空回填区对围岩的应力重分布影响较大。但软弱层与隧道相交时，软弱层中的应力和变形无论是数值还是影响范围都较大，容易造成围岩的破坏，同时围岩对支护的作用也加大，容易造成支护的变形和失稳，在支护时应特别加以重视。本论文的创新之处在于系统分析了大跨度穿煤隧道围岩的稳定性，提出了大跨度穿煤隧道围岩稳定性科学判定方法，该研究据有重要的理论和实践指导意义。关键词：大跨度隧
2、道，穿煤段，围岩稳定性Ⅱ重庆大学硕士学位论文英文摘要ABSTRACTIntiffsyear,withthedevelopmentofourcountry’shighway,theC,OnSll"ucIioIIscaleofhighwaytunneliscomiaglargerandlarger,whichplaysimportantroleindecreasing们伍caccidentrate．shorteningdrivingdistance,increasingvehidespeedandenviommentalprotection．Howe
3、ver,withtheeo删onofI．arge-spanTunnelsthrouchthecoalseam,itapl∞aredthattherea糟manyunre∞vledproblemsinCriterionanalysisandtheoryofstabilityofsurrouadingrock．ThisarticleaimsatthelaotspotinLarge-spanTunnelsthroughthecoalseamresearch．selectsExpresswayCirclingChongqingCity,Huanshanp
4、ingTunnelaStheobject．b舔ing011definitionandanalysisLarge-spanTunnelsanditsmechanismofinteractionofRockandSupport,simulatingSurroundingIbckDeformationandsb≈ssdistributionafterllmnel$druggedbysotlware,combiningtheresultofTheMonitorMeasuringinNalm,studiesthestabilityofsurrounding
5、rockofLarge-spanTunnelsthroughthecoalseam)，andputsforwardCriterion,anddrawsconclusionsaSfollowing：①Maxequivalentsll'esseoncenlrationcoefficientofLarge-spanTunnelsvarieswithflatratio嬲inverseratio，whichisclosetolinerelationship．Whenflatrateis0．5，Maxequivalentstressconcentration
6、coefficientofLgll-gC-SlYdnTunnelsismOl'ethan1．5timesofthesameofCircularChamber．②SensitivityofequivalentstresseoneenlzafioneoetfieientfromVaulttoabutmentisdifferent,surroundingrocknearbytheabulmentisthemostsensitive,whilesurroundingrocknearbytheVaultdocsn’tvarywithflatrate．③Ch
7、amberstresseoneenwationofLa／'gl。-Spltl3Tunnels恤o．ghthecoals锄is粤巴吐er，buttheflatratevaryruleistheSalllC．AseriesOrphysicalphenomenonsuchaSRoekburst,convergentdeformation,DeformationoftheTunnel,roelffall．collapse，appearswitheonsmaedonprocessoftunnel,trugg吨④Duringlarge·卿Tunnelsthr
8、oue．bthecoal灿digging,distortionCOUI'鬻ofsurrounclingrockliesontlaecut
