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本文从破裂特点、声发射特点及应力位移曲线方面讨论了软弱夹层与主压应力轴交角对断层带活动的影响。实验证明,当交角大于45°时破裂分为三阶段;主震前在断层带及其附近有大量前震,并且沿断层两盘发生较明显的位移,但交角小于45°时则没有。
In this paper, we discuss the influence of fault zone, acoustic emission characteristic and stress-displacement curve on the fault zone activity with the intersection of soft interlayer and main compressive stress axis. Experiments show that when the angle of intersection is greater than 45 °, the rupture is divided into three phases. Before the main shock there are a large number of foreshocks in the fault zone and its vicinity, and more obvious displacements occur along the fault plate.