当岩体受到力的作用时,岩体内部的应力发生变化并产生变形,在围压、温度等条件有利于断层稳定滑动的前提下,作用于断层上的构造应力超过某一临界值(或断层静摩擦力)时,断层就开始蠕滑。此时构造应力若不再加强,断层两侧的应力可能因蠕滑而减小,断层两端的应力则增高。因此,在断层活动以前和活动的初始阶段,地应力的变化和断层 When the rock mass is subjected to force, the stress in the rock mass changes and deforms. Under the conditions of confining pressure and temperature being favorable for the stable sliding of the fault, the tectonic stress acting on the fault exceeds a certain critical value Fault static friction), the fault began to creep. If the tectonic stress is no longer strengthened, the stress on both sides of the fault may decrease due to creep and the stress on both ends of the fault will increase. Therefore, before the fault activity and in the initial stage of activity, the variation of the ground stress and the fault