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软岩是复杂的多相体系,存在着内在的不均匀性和孔隙性。岩体工程进入深部后,软岩进一步增加,表现出“三高一扰动”的特点,传统的岩石力学研究方法中多把软岩抽象为连续介质,忽略其不连续和不均匀性,且不考虑深部环境中温度和孔隙压的影响。本文将其视为多孔介质,从定义出发,引入动态孔隙度模型,并论证了假设的严密性,同时,考虑温度和孔隙压的影响,推导出修正的有效应力通式,最终建立了适合深部环境的软岩多孔介质模型。
Soft rock is a complex heterogeneous system with inherent inhomogeneities and porosity. After the rock mass project goes deep, the soft rock increases further and shows the characteristics of “three highs and one disturbance ”. In traditional rock mechanics research method, many soft rocks are abstracted as continuous medium, ignoring its discontinuity and inhomogeneity, Without considering the effects of temperature and pore pressure in deep environments. In this paper, we consider it as a porous medium. From the definition, we introduce a dynamic porosity model and demonstrate the rigor of the hypothesis. At the same time, considering the effect of temperature and pore pressure, we derive a modified general formula of effective stress. Finally, Environmental soft rock porous media model.