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.Thischapterprovidesasummaryo

2、fthekeyitemsfoundinthishandbooksuchthatthepractitionerisprovidedwithguidanceforsupportselectioninburst-pronegroundwithoutundertakingalloftheanalyticalstepsnecessarytocompleteadetaileddesign.Forthissummarychapter,detailsoftheanalysisprocedureshavebeenomitted,buttheyaredescribedinsubsequentchapte

3、rs.Rockburstdamagereferstodamagethatoccursaroundanexcavationinasuddenorviolentmannerandisassociatedwithaseismicevent.Rockburstdamagemaynotnecessarilyresultinejectionofrockintotheexcavation,especiallyiftheexcavationiswellsupported.Thedamagemechanismsassociatedwithdifferenttypesofrockburstsvaryfr

4、omsituationtosituation(Kaiser1993;OrtleppandStacey1940).Thefirststepindealingwithsupportselectionforburst-proneconditionsistoestimatethetypeofdamagemechanisminvolvedandthelikelyseverityoftheresultingdamage.Alsoitisusefultounderstandtheconditionsthatleadtoortriggerarockburst.2.2Whatcausesrockbur

5、sts?Forthepurposesofhazardassessmentandsupportdesignwedistinguishbetweenrockburststhataretriggeredbyremoteseismicsourcesandrockburststhatare“self-initiated”.Forself-initiatedrockbursts,thelocationofthedamageandtheseismiceventarethesame.2.2.1Self-initiatedrockburstsSelf-initiatedrockburstsoccurw

6、henthestressesneartheboundaryofanexcavationexceedtherockmassstrength,andfailureproceedsinanunstableorviolentmanner.Thestressesgenerallyincreaseasaresultofnearbymining.Inaddition,therockmassstrengthmaydegradewithtimeorwithlossofconfinement,leadingtosuddenfailure.Ineithercasetherockmassstrength-t

7、o-stressratioreachesunityandtherockfails.Thefailureprocessissuddenandviolentifthestoredstrainenergyintherockmassisnotdissipatedinagradualmanner.Thisoccurswhenthestiffnessoftheloadingsystem,i.e.,theminestiffness,issofterthantheunlo