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通过分析岩石受力破坏过程的膨胀扩容效应,研究了采动效应下断层系统的变形稳定性问题。随着开挖不断接近断层带,断层带附近应力不断集中,相当于对断层带及周围介质组成的系统所进行的一个不断加载过程,当到达临界条件时,系统发生失稳。断层活化的物理本质就是在加载过程中,随着应变(由应力集中所引起)的不断积累到一定程度,岩石进入体积膨胀阶段,导致系统物理力学性质的变化。
By analyzing the expansion and expansion effect of the rock during the mechanical failure, the deformation and stability of the fault system under the mining effect are studied. As excavation continues to approach the fault zone, the stress concentration in the vicinity of the fault zone is continually concentrated. This is equivalent to a continuous loading process of the system consisting of the fault zone and the surrounding medium. When the critical conditions are reached, the system instability occurs. The physical essence of fault activation is that during the loading process, with the continual accumulation of strain (caused by stress concentration), the rock enters the phase of volume expansion and leads to the change of physical and mechanical properties of the system.