Abstract: The spatial and temporal evolutions of the physical fields during the deformation of a 5癰endfault are studied by experimental and numerical methods.It is shown that the AE events nearbend point occurred usually at the beginning time or the ending time in an AE event sequence.Even though their magnitude are small,they are very significant.During the deformation twofault segments on each side of the bend point become initiative,alternatively. The bend pointplays a role of valve during the displacement along a fault.

Key words: Acoustic emission, Fault displacement, Strain, Rock frivtional test, Numerical simulation

摘要： 以实验方法和数值模拟方法研究了含5°拐折的断层在变形过程中物理场的时空演化。结果表明在一次事件序列中拐折部位的声发射往往发生在序列开始时和结束时,震级虽不大,但却有重要意义。在断层错动中拐折部位两侧的断层交替地作为变形主体构造,拐折部位则起了错动阀的作用。

关键词: 声发射, 断层位移, 应变, 数字模拟