三轴实验测定的几种地壳岩石在高压下的剪切断裂参数  

Shear Fracture Parameters of Several Crustal Rocks under High Confining Pressure by Triaxial Testing

作　　者：张流[1] 李彪[1] 高平[1] 王宝生[1] 

机构地区：[1]国家地震局地质研究所

出　　处：《中国地震》1991年第2期12-18,共7页Earthquake Research in China

基　　金：国家自然科学基金;地震科学联合基金

摘　　要：本文从地震失稳分析的角度,认为剪切裂纹(断层)扩展的滑动弱化模型可以由下列参数系统表征:断裂能G,弱化带大小ω,特征位移δ~*或平均特征位移(?),应力降τ_p—τ_f和应力下降函数h;采用三轴实验方法对一些地壳岩石在高围压/正应力条件下的断裂参数进行了测定并就岩石在高压下的剪切断裂参数的一般特征等问题进行了讨论。In view of the analysis of earthquake instability, it is presented that slip-weakening model for the propagation of shear crack (faulting) is characterized systematically by following parameters: fracture energy G, the size of weakening zone ω ,characteristic displacement δ or its mean value δ,stress drop τp - τf and stress-down function h. The shear fracture parameters of several crustal rocks at high confining pressure/high normal stress have been measured by triaxial testing. The general features of shear fracture parameters of rock at high pressure are discussed.

关 键 词：地壳 岩石 剪切 断裂 

分 类 号：P315.1[天文地球—地震学]