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1、InternationalJournalofRockMechanics&MiningSciences48(2011)210–218ContentslistsavailableatScienceDirectInternationalJournalofRockMechanics&MiningSciencesjournalhomepage:www.elsevier.com/locate/ijrmmsRockdamagecontrolinbedrockblastingexcavationforanuclearpowerplanta,naabaaLiHaibo,XiaXia
2、ng,LiJianchun,ZhaoJian,LiuBo,LiuYaqunaStateKeyLaboratoryofGeomechanicsandGeotechnicalEngineering,InstituteofRockandSoilMechanics,ChineseAcademyofSciences,Wuhan430071,ChinabSwissFederalInstituteofTechnologyLausanne,CH–1015,Lausanne,SwitzerlandarticleinfoabstractArticlehistory:Drillandb
3、lastisamajormethodforbedrockexcavationinnuclearpowerplantengineering.UnderReceived21October2009blastingexcavation,blast-inducedvibrationpropagatesinrockmassandinducesdamagetosurroundingReceivedinrevisedformrock.Studyingthecharacteristicsofwavepropagationandblast-induceddamagetorockmas
4、sismost8November2010importanttorestrictthedamageextension.Inthepresentpaper,insupportofthebedrockblastingAccepted26November2010excavationfortheLinaoNuclearPowerPlantproject(LNPP),thesiteseismicsurveyandsonicwavetestAvailableonline24December2010arepresentedtostudythecharacteristicsofwa
5、vepropagationandtheblast-induceddamageforrockKeywords:mass.Theexplosiveload,rockdamagecharacteristicsandpeakparticlevelocity(PPV)attenuationlawareBlastingexcavationalsoinvestigatedbynumericalsimulationusingcommercialsoftware.ItcanbeseenthatthenumericalPeakparticlevelocitysimulationres
6、ultsagreewellwiththatobtainedbysitemonitoring.BasedonthesitemonitoringandtheRockdamagenumericalsimulation,therelationshipbetweenPPVat30mawayfromthechargeholeandthedamageSafetythresholddepthofrockmassisestablished.Asimplemethodbasedonsafetythresholdofvibrationvelocityforrockmasstorestr
7、ictthedamagedepthofrockmassunderblastingexcavationispresented.Accordingtothedamagecontrolledmethodandthepresentedsafetythresholdofvibrationvelocityforrockmass,theremainedbedrockcanbesimplyandeffectivelyprotectedduringblastingexcavation.&2010ElsevierLtd.Allrightsreserved.1.Introduction
8、point
