不同应力路径岩石能量耗散研究现状及分析

Research status of energy dissipation of rock under different stress paths and analysis

深部岩体在受力破坏过程中,能量耗散是引发岩石损伤、破坏的内在动力,可能导致岩爆等动力灾害,因此不同应力路径下岩石能耗问题的研究越来越重要。结合文献,对岩石在不同应力路径下的破坏过程中能耗问题的研究进行总结,表明:仅考虑一维应力条件下岩石破坏过程中的能耗问题是不全面的,需深入分析多维应力条件下岩石的能耗规律;能量耗散反映岩石微裂纹闭合演化程度,通过能耗判断岩石损伤特性是一种有效可行的方法;循环加卸载路径下的能耗演化工作量不足。而层状复合岩石是岩体结构的薄弱环节,对岩体稳定性具有重要影响,有必要进一步对其动力学特性及能耗规律展开研究,以正确综合评价岩石破坏的力学特性。

In the process of rock mass failure,energy dissipation and energy release is the inherent power of rock damage and failure,and may cause rock burst power disasters of rock under different stress paths.In view of the energy dissipation problem of rock mass under different dynamic stress conditions.In this paper,the energy dissipation and release of rocks under different stress paths are summarized based on the existing literatures.It is shown that it is not comprehensive to consider the energy consumption of rock failure process under the condition of one-dimensional dynamic stress,and energy dissipation is an effective and feasible method to judge the damage degree of rock micro cracks.The energy consumption is insufficient under cyclic loading and unloading path.Bedded composite rock is the weak link of the rock mass structure,has an important effect on the stability of rock mass.it is necessary to further the dynamic characteristics on the energy dissipation law of the mechanical properties.And expected to correctly evaluate the mechanics and energy consumption characteristics of rock failure process through the analysis and comparison.