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页数:15页
时间:2019-02-28
《A physical model study of jointed rock mass strength under uniaxial compressive loading.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Tocitethispaper:Int.J.RockMech.&Min.Sci.34:3-4,paperNo.165.Copyright©1997ElsevierScienceLtdCopyright©1997ElsevierScienceLtdInt.J.RockMech.&Min.Sci.Vol.34,No.3-4,1997ISSN0148-9062Tocitethispaper:Int.J.RockMech.&Min.Sci.34:3-4,PaperNo.165APHYSICALMODELSTUDYO
2、FJOINTEDROCKMASSSTRENGTHUNDERUNIAXIALCOMPRESSIVELOADINGP.H.S.W.Kulatilake;W.He;J.Um;H.WangDept.ofMining&GeologicalEngineering,UniversityofArizona,Tucson,AZ85721,U.S.A.ABSTRACTJointedrockmassstrengthisinvestigatedthroughphysicalmodelingusingmodelmaterialblo
3、ckssubjectedtoonlyuniaxialcompressiveloading.Jointedmodelmaterialblocksexhibiteddifferentfailuremodesdependingonthejointconfigurations.Orientationofthejointsetsplayedasignificantrolerelatedtothemodesoffailure.Itwaspossibletoobtainastrongnon-linearrelationb
4、etweenthejointedmodelmassstrengthandthefracturetensorcomponenttocoverthestrengthsresultingfromallthedifferentfailuremodesobservedintheinvestigation.Thefracturetensorcomponentwasusedtoobtainthecombinedeffectofnumberofjointsets,jointdensity,anddistributionso
5、fsizeandorientationofthejointsetsinachosendirection.Neededfutureresearcharesuggestedtogeneralizethepromisingrockmassstrengthcriterionobtainedintheperformedresearch.Copyright©1997ElsevierScienceLtdKEYWORDSRockmassstrengthphysicalmodelingdiscontinuitiesaniso
6、tropyscaleeffectscompressivestrengthINTRODUCTIONAgoodunderstandingofthemechanicalpropertiesofjointedrockmassesisvitaltoarriveatsafeandeconomicaldesignsforstructuresbuiltinandonrockmasses.Thepresenceofvariousdiscontinuities,theinherentstatisticalnatureofthe
7、irgeometricalparameters,andtheuncertaintiesinvolvedintheestimationoftheirgeomechanicalandgeometricalpropertiesmakeitcomplicatedanddifficulttoaccuratelypredictthemechanicalpropertiesofjointedrockmasses.Somein-situtestshavebeencarriedouttostudytheeffectofsiz
8、eonrockmasscompressivestrength(Bieniawski1968;Prattetal.1972;Bieniawski,VanHeerden1975).Heuze1980hasreviewedthepreviousworkonscaleeffectsonmassstrength.Theresultsoftheseinvestigationsclearlyshowthereductionof
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