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本文讨论了地震发生时传播的剪切断层遇到横交的粘锁不好的静止断层时的各种情况。文中指出,传播的剪切断层端部有压应力和张应力,静止断层对压应力和张应力的反应是不同的。压应力可以通过静止断层而传入该断层的另一侧介质中(尽管有衰减),但张应力就可能把静止断层拉裂而传不到静止断层的另一侧介质中去。这样,当一个传播的剪切断层在未和静止断层相遇时,它的端部有很高的剪切应力,但越过静止断层后只剩下(或主要剩下)压力所引起的剪切应力了。此时剪切应力大大衰减,因之剪切断层的传播就停止了。当然在断层交会地区介质破碎松软,这也是断裂停止的一个原因。震前确定停止地点有助于确定孕震体的长度,由此可对未来震级大小作出估计。
In this paper, we discuss various situations when a shear fault propagating at the time of an earthquake encounters a cross-intersecting poorly-locked static fault. It is pointed out in the paper that there are compressive and tensile stresses at the ends of the propagating shear faults and that the static faults respond differently to compressive and tensile stresses. The compressive stress can be introduced into the other medium of the fault (though attenuated) through the static fault, but the tensile stress may fracture the static fault to the medium on the other side of the static fault. Thus, when a propagating shear fault encounters a still fault, it encounters a high shear stress at its tip, but only the shearing stress (or predominantly left) pressure caused by the rest of the static fault It’s The shear stress is greatly attenuated at this point, and the propagation of the shear fault ceases. Of course, the media in the area of the fault intersection are soft and fragile, which is one reason for the breakage of the fault. Determining the location of the stop before the earthquake helps determine the length of the seismogenic body, which can make an estimate of the magnitude of future earthquakes.