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1、第39卷第7期煤炭学报Vol.39No.72014年7月JOURNALOFCHINACOALSOCIETYJuly2014张黎明,高速,任明远,等.岩石加荷破坏弹性能和耗散能演化特性[J].煤炭学报,2014,39(7):1238-1242.doi:10.13225/j.cnki.jccs.2013.1318ZhangLiming,GaoSu,RenMingyuan,etal.Rockelasticstrainenergyanddissipationstrainenergyevolutioncharacteristicsunderconven-tionaltriaxialcomp
2、ression[J].JournalofChinaCoalSociety,2014,39(7):1238-1242.doi:10.13225/j.cnki.jccs.2013.1318岩石加荷破坏弹性能和耗散能演化特性1,2,31111张黎明,高速,任明远,王在泉,马绍琼(1.青岛理工大学理学院,山东青岛266033;2.青岛理工大学蓝色经济区工程建设与安全山东省协同创新中心,山东青岛266033;3.中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008)摘要:开展大理岩、灰岩和砂岩的常规三轴试验,研究岩石变形过程的能量非线性演化特征。结果表明:岩样屈服前外力功
3、大部分转化为弹性应变能存储于岩样内部,耗散能增加的很少,屈服点后耗散能快速增加,弹性能增速变缓。岩石的极限存储能具有围压效应,随着围压增加,岩石破坏时的极限存储能逐渐增加。极限存储能还与岩石本身的性质有关,岩石的强度越高,脆性越强,极限存储能愈大。灰岩极限存储能最大,大理岩极限存储能次之,砂岩极限存储能最小。根据弹性能和耗散能的演化规律,构建了岩石变形破坏过程中弹性应变能的非线性演化模型,理论模型与3种岩石的试验结果吻合较好。关键词:岩石破坏;弹性应变能;耗散应变能;能量演化中图分类号:TD313文献标志码:A文章编号:0253-9993(2014)07-1238-05Rocke
4、lasticstrainenergyanddissipationstrainenergyevolutioncharac-teristicsunderconventionaltriaxialcompression1,2,31111ZHANGLi-ming,GAOSu,RENMing-yuan,WANGZai-quan,MAShao-qiong(1.CollegeofScience,QingdaoTechnologicalUniversity,Qingdao266033,China;2.Co-operativeInnovationCenterofEngineeringConstruc
5、tionandSafetyinShandongPeninsulaBlueEconomicZone,QingdaoTechnologicalUniversity,Qingdao266033,China;3.StateKeyLaboratoryforGeoMechanicsandDeepUndergroundEngineering,ChinaUniversityofMining&Technology,Xuzhou221008,China)Abstract:Inordertogetfeaturesofenergynonlinearevolutionduringrockfailurepr
6、ocess,conventionaltriaxialcom-pressiontestsofmarble,limestoneandsandstonewerecarriedout.Resultsshowthatmostofexternalworkisconvertedintorockelasticstrainenergybeforerockyielding.Dissipationstrainenergyincreaserapidlyafterrockyielding.How-ever,elasticstrainenergyincreasesslowly.Rocklimitstorag
7、eenergyincreaseswiththeconfiningpressureincreasing.Rocklimitstorageenergyisalsorelatedtotherocknature.Thehigherstrengthandstrongerbrittlenessofrock,itslim-itstorageenergyislarger.Themaximumlimitstorageenergyoflimestoneisbiggestinthreekindsofr