滑动方向相反的含障碍体平行断层失稳破坏应变场变化特征的研究  

Study on the characteristics of strain field of rock failure experiment with patches for the opposite slip direction of parallel faults

作　　者：焦明若[1] 张国民[1] 

机构地区：[1]中国地震局分析预报中心

出　　处：《地震》2001年第3期21-30,共10页Earthquake

基　　金：国家重点基础研究发展规划项目 ( G19980 4 0 7);中国地震局构造物理开放实验室基金资助项目

摘　　要：通过对滑动方向相反的含障碍体平行断层失稳破坏岩石破裂实验的应变场时空分布特征的分析 ,探讨了岩石破坏过程和破坏方式。并且通过对平行断层和障碍体破坏所产生的相互作用和影响的分析 ,进一步研究了这种滑动方向相反的含障碍体平行断层失稳破坏的增、减震机制 ,结果表明是一种互为增震机制。最后通过数值模拟技术对实验的破坏过程进行了模拟 ,证明了实验结果与数值模拟结果一致 。By analyzing rock failure experiment with patches of the opposite slip direction of the parallel faults through the spatial and temporal evolution images of strain field, rock failure process and mode are studied. Moreover, by analyzing the interaction among patches and two faults′ failure, the mechanism that enhances or delays the occurrence of an earthquake in the above model is deeply studied. Results suggest that the interaction mode is to advance the time of occurrence of seismicity. At last, the paper simulates the experimental results by the finite simulation method, showing that experimental results are consistent with those of simulative ones, and also indicating that experimental result is of reproducibility.

关 键 词：障碍体 滑动方向 平行断层 失稳破坏 应变场 时空分布 数值模拟 

分 类 号：P315.2[天文地球—地震学]