含典型裂纹系硬包体试样破裂机制的数值试验  

Numerical Tests on Fracture Mechanism of Hard Inclusion Specimen with Typical Cracks

作　　者：刘庭金[1] 唐春安[1] 焦明若[1] 

机构地区：[1]东北大学岩石破裂与失稳研究中心,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2001年第5期553-556,共4页Journal of Northeastern University(Natural Science)

基　　金：国家重点基础研究发展规划项目 (G19980 40 70 0 );国家自然科学基金资助项目 ( 4 99740 0 9)

摘　　要：运用自行开发的岩石破裂过程分析系统RFPA2D,对 6种含不同典型裂纹系的硬包体试样的破裂机制进行了数值试验·结果表明 :硬包体的存在有利于在包体及其上下两端的母岩中形成高应力区 ;裂纹系最终沿加载控制方向扩展 ,并终止在其他方向上的扩展 ;含Γ形裂纹系的硬包体试样容易发生破裂 ,其声发射频度低 。Fracture mechanism of hard inclusion specimen with six different typical cracks was simulated by using RFPA 2D code. The results show that high stress concentration field is formed in inclusion and its flank mother rock for the existence of hard inclusion; final directions of cracks propagation are to be towards loading direction; specimen with Γ type cracks is easiest to induce in earthquake though its release energy is lowest, whereas energy of specimen with A3 type cracks is highest though most difficult to induce in earthquake.

关 键 词：岩石破碎 典型裂纹系 硬包体 数值试验 破裂机制 地震 孕震模式 

分 类 号：P315.72[天文地球—地震学]