盐岩短期强度和变形特性试验研究  

EXPERIMENT STUDY ON SHORT-TERM STRENGTH AND DEFORMATION PROPERTIES OF ROCK SALTS

作　　者：刘江[1] 杨春和[1] 吴文[1] 李银平[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩石力学与工程学报》2006年第z1期3104-3109,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50434050;50374064);国家重点基础研究发展规划(973)项目(2002CB412704)

摘　　要：分别选定湖北应城盐矿和江苏金坛盐矿为示范工程,通过盐岩单轴压缩试验、三轴压缩试验及巴西劈裂试验,对两盐矿的盐岩试样的短期强度和变形特征进行分析,获得盐岩的短期强度和变形的力学参数。分析表明,两盐矿的盐岩表现出许多共同的力学特性,但在量值上却有差异。利用试验结果绘制莫尔包络线,分别得到两盐岩的强度参数,结果表明,两地盐岩的强度均符合Mohr-Coulomb破坏准则。试样弹塑性变形能力和扩容变形能力的分析表明,盐岩具有一定的塑性变形和扩容变形能力,高围压下还表现出明显的应变硬化特征。本研究成果可为盐岩地下工程稳定性分析及能源深部地下储存及选址提供一定的参考。The rock salts from Yingcheng mine of Hubei Province and Jintan mine of Jiangsu Province were studied through uniaxial compression,triaxial compression and Brazilian tests.The properties of short-term strength and deformation of the two rock salts were analyzed.The experimental results indicated that the rock salts from two different places exhibit similar mechanical behaviors though there are some quantitative discrepancies.The failure of two kinds of rock salts can be described well by Mohr-Coulomb failure criteria.The results also indicated that the rock salts have considerable plastic deformation capability and dilatant deformation capability;and the rocks behave obvious strain hardening characteristic under high confining pressure.The presented results can be expected to provide useful references to the stability analysis of rock salt in underground engineering and the site selection of energy storage in rock salts.

关 键 词：岩石力学 盐岩 短期强度 压缩试验 应变硬化 扩容 

分 类 号：TU458[建筑科学—岩土工程]