5°拐折构造变形物理场的实验研究与数值模拟

EXPERIMENTAL STUDY AND NUMERICAL SIMULATION ON PHYSICAL FIELDS DURING THE DEFORMATION OF A 5°BEND FAULT

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。

The spatial and temporal evolutions of the physical fields during the deformation of a 5°bendfault 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.