摘要
利用伺服试验机对大理岩进行了常规三轴压缩试验,基于试验结果,研究了岩样三轴压缩变形破坏及其能量特征。结果表明,低围压时岩样内部材料并未均匀化,岩石表现为应变软化特性;而高围压时岩样内部材料强度由低到高逐渐屈服,变形趋于均匀,岩石出现塑性流动特性。岩石峰值应变与围压成正线性关系;岩石残余强度对围压的敏感性显著高于峰值强度。岩石破坏应变能随着围压的增大而增大,且两者成正线性关系;岩石全部断裂能随着围压的增加亦成正线性增加。
In the paper, experiments were carried out to investigate marble specimens under conventional triaxial compression by the RMT-150B servo-controlling testing machine. Based on the experimental results, the ：deformation failure and energy properties of marble specimens under conventional triaxial compression were studied. The results show that marble will manifest the property of strain inteneration when the material in the rock does not turn uniform under the lower confining pressure. However, marble will show the property of plastic flowage when the material deformation becomes uniform under higher confining pressure. There is a a positive linear relation between the peak strain of rock material and the confining pressure. The sensitivity of residual strength on the confining pressure is higher than that of peak strength. The failure strain energy of rock increases linearly as the confining pressure increases. The total fracture energy of rock specimens also increases linearly as confining pressure increases.
出处
《工程力学》
EI
CSCD
北大核心
2007年第1期136-142,共7页
Engineering Mechanics
基金
国家重点基础研究发展规划973项目(2002CB412707)
江苏省高等学校2004年度研究生创新计划项目(Xm04-39)
关键词
岩石力学
大理岩
变形
破坏应变能
全部断裂能
rock mechanics
marble
deformation
failure strain energy
total fracture energy
作者简介
杨圣奇（1978），男，江苏阜宁人，博士，主要从事岩石力学与工程方面的研究工作（E-mail：yangsqi@163.com）。
徐卫亚（1962），男，江苏张家港人，教授，博士，博导。主要从事岩石力学与工程方面的教学与科研工作；
苏承东（1961），男，陕西佛坪人，高级工程师，主要从事岩石力学与采矿工程的教学与科研工作。
