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高地应力大型地下洞室群的稳定性问题一直是众多岩石力学工作者的关注热点。从张开位移的产生机制出发,结合能量耗散原理,对高地应力脆性岩体能量耗散本构方程及其工程应用做了初步的探讨。从能量耗散的角度出发,引出了加、卸荷作用时的变弹模模型,并将该理论应用到弹脆性本构方程中;利用FLAC3D软件的二次开发功能,在C++的环境下进行上述模型程序模块的编写工作,实现模型的二次开发;以锦屏一级大型地下洞室群为工程背景,进行实际工程的开挖模拟计算。模拟结果表明,考虑能量耗散的弹脆性模型能更真实地反映实际开挖情况,其结果对类似工程具有一定的指导意义。
High-stress The stability of large-scale underground caverns has been the focus of many rock mechanics workers. Based on the mechanism of open displacement and the energy dissipation principle, the energy dissipative constitutive equation and engineering application of high-stress brittle rock mass are discussed. From the energy dissipation point of view, the model of variable modulus with or without loading and unloading is derived, and the theory is applied to the elastic brittleness constitutive equation. The secondary development of FLAC3D software is implemented in C ++ environment The above model program module was written to realize the secondary development of the model. Taking the Jinping-level large-scale underground cavern group as the engineering background, the actual engineering excavation simulation was carried out. The simulation results show that the elastic-brittle model considering the energy dissipation can reflect the actual excavation situation more faithfully, and the result is of guiding significance to similar projects.