摘要
为了揭示层状岩石力学特性的各向异性,对7种不同层理角度下的板岩进行单轴压缩试验,测出了板岩的弹性模量E和E′、泊松比ν和ν′以及剪切模量G′,并运用单弱面理论分析单轴抗压强度和破坏形式与层理角度之间的关系。研究结果表明板岩压缩破坏存在2种形式:当0°≤<10.5°和87.0°<≤90.0°时,板岩从内部发生压缩剪切破坏,剪切面粗糙不平;当10.5°≤≤87.0°时,板岩沿层理面产生滑移破坏,表面较光滑。板岩受内部层理构造的影响,随着从0°变化到90°,抗压强度呈现两端大中间小的趋势,视弹性模量Eθ以及视泊松比νyx和νyz由小变大。
To reveal the anisotropy of mechanical properties for layered rock, the five elastic parameters on uniaxial tests under seven different kinds of bedding angle 0 were measured, and the relationship among the uniaxial compressive strength and failure mode and the bedding angle 0 were explained by single discontinuity theory. The results show that there are internal compression shear failure and shear surface failure. Both of the failure forms take place while the bedding angle is 0~~〈 O〈 10.5~ and 87.0~〈 0~90.0~. When the bedding angle is 10.5^--,〈 0~87.0~ sliding failure of the bedding plane happens and the failure surface becomes very smooth. Because of the impact of internal bedding structure on the slate, the compressive strength reaches its minimum value in the middle and maximum value on two sides with the bedding angle 0 varies from 0 to 90.0. Moreover, the apparent elastic modulus Eo and Poisson＇s ratio of vyx and v increase from small to large.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第8期3398-3404,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51008308
51108397)
湖南省研究生创新项目(CX2012B057)
关键词
岩石力学
横观各向同性
弹性参数
抗压强度
破坏形式
rock mechanics
transversely isotropic
elastic parameter
compressive strength
failure modes
