Abstract Stability analysis of underground structures made in fractured porous continua requires knowledge of rock deformation and pore pressure. Often, reinforcements in terms of rock bolts are installed to enhance the stability and hence the interaction between rock mass and bolt shank becomes inevitable. Extended Finite Element Method (XFEM) has been applied to handle the pre-existing joint planes and rock bolts. Porous media is simulated using Biot’s consolidation theory, whereas fluid flow through fracture is achieved via Cubic law. This paper presents a comprehensive numerical formulation of fractured porous rock media with reinforcement and fluid flow. Apart from solving a benchmark problem, stability of a reinforced tunnel in the vicinity of a joint is also presented using the proposed numerical procedure.

中文翻译：

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螺栓增强完全饱和断裂多孔介质的丰富数值程序

摘要 裂缝多孔连续体中地下结构的稳定性分析需要岩石变形和孔隙压力的知识。通常，安装岩石锚杆来增强稳定性，因此岩体和锚杆杆之间的相互作用变得不可避免。扩展有限元方法 (XFEM) 已应用于处理预先存在的接头平面和岩石螺栓。多孔介质是使用 Biot 固结理论模拟的，而流体通过裂缝的流动是通过三次定律实现的。本文提出了具有加固和流体流动的裂缝性多孔岩石介质的综合数值公式。除了解决基准问题外，还使用所提出的数值程序介绍了接缝附近加固隧道的稳定性。