不同围压下灰岩的强度与变形特性试验研究  

Experimental research on limestone of strength and deformability under different confining pressures

作　　者：熊赞民[1] 高全臣[1] 邬爱清[2] 胡建敏[2] 

机构地区：[1]中国矿业大学力学与建筑学院,北京100083 [2]长江科学院岩基研究所,武汉430010

出　　处：《岩土力学》2007年第S1期111-113,共3页Rock and Soil Mechanics

基　　金：雅砻江水电开发联合研究基金(No.50639090)

摘　　要：针对灰岩进行了室内常规三轴试验,对试样在不同围压下的强度和变形特性进行了分析。结果表明:灰岩的变形分为4个阶段,在2～10MPa的围压范围内,岩石为脆性剪切破坏。其峰值强度、残余强度随围压的增加而增加,但峰值时的变形与围压的大小没有相关性;根据试验数据的回归分析,得到灰岩强度准则的表达式。Triaxial compressive tests on limestone are conducted with a variety of confining pressures that range from 2MPa to 10MPa. This observation causes us to conclude that the deformation of limestone can be divided into four stages and the wreck is brittle cutting,The peak and stub intensity value increase with the confining pressure adding up,but the strain of the stress peak has no relativity to the confining pressure. By the redressing analysis,the formula of relation between intensity parameters is produced.

关 键 词：灰岩 三轴压缩 试验 

分 类 号：TU458[建筑科学—岩土工程]