加拿大岩爆支护手册 外文翻译

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1、本科毕业设计英文翻译题目加拿大岩爆支护手册学院水利水电学院专业水利水电工程　学生姓名尹刚　学号0943062172年级09级　指导教师张茹　二Ο一三年六月三日四川大学本科毕业设计英文翻译—CanadianRockburstSupportHandbook2.1IntroductionExplicitanalysisofeachpotentialrockburst-damagemechanismandtheinteractionbetweentherockmassandthesupportsystemarecomplextasks.Thischap

2、terprovidesasummaryofthekeyitemsfoundinthishandbooksuchthatthepractitionerisprovidedwithguidanceforsupportselectioninburst-pronegroundwithoutundertakingalloftheanalyticalstepsnecessarytocompleteadetaileddesign.Forthissummarychapter,detailsoftheanalysisprocedureshavebeenomitt

3、ed,buttheyaredescribedinsubsequentchapters.Rockburstdamagereferstodamagethatoccursaroundanexcavationinasuddenorviolentmannerandisassociatedwithaseismicevent.Rockburstdamagemaynotnecessarilyresultinejectionofrockintotheexcavation,especiallyiftheexcavationiswellsupported.Theda

4、magemechanismsassociatedwithdifferenttypesofrockburstsvaryfromsituationtosituation(Kaiser1993;OrtleppandStacey1940).Thefirststepindealingwithsupportselectionforburst-proneconditionsistoestimatethetypeofdamagemechanisminvolvedandthelikelyseverityoftheresultingdamage.Alsoitisu

5、sefultounderstandtheconditionsthatleadtoortriggerarockburst.2.2Whatcausesrockbursts?Forthepurposesofhazardassessmentandsupportdesignwedistinguishbetweenrockburststhataretriggeredbyremoteseismicsourcesandrockburststhatare“self-initiated”.Forself-initiatedrockbursts,thelocatio

6、nofthedamageandtheseismiceventarethesame.2.2.1Self-initiatedrockburstsSelf-initiatedrockburstsoccurwhenthestressesneartheboundaryofanexcavationexceedtherockmassstrength,andfailureproceedsinanunstableorviolentmanner.Thestressesgenerallyincreaseasaresultofnearbymining.Inadditi

7、on,therockmassstrengthmaydegradewithtimeorwithlossofconfinement,leadingtosuddenfailure.Ineithercasetherockmassstrength-to-stressratioreachesunityandtherockfails.Thefailureprocessissuddenandviolentifthestoredstrainenergyintherockmassisnotdissipatedinagradualmanner.Thisoccursw

8、henthestiffnessoftheloadingsystem,i.e.,theminestiffness,issofterthantheunlo