Abstract During drilling and blasting construction, a water inrush can be caused by damage to a water-resisting rock mass. Tunnel water inrush is a common anthropogenic geological hazard in engineering. The traditional finite element method (FEM) is less accurate in dealing with large deformation problems, and the Discrete element method (DEM) cannot realize engineering scale operation. In this study, the Johnson-Holmquist damage constitutive model was adopted, based on the LS-DYNA secondary development technology. A fluid grid was used in the blast damage area, and smooth particle hydrodynamics (SPH) were introduced to simulate the fluid. The far area of the tunnel is calculated by solid grid, forming a coupled algorithm of FEM and DEM. Based on a case study of the Yonglian Tunnel, this study simulated the evolution of a tunnel water inrush under the action of blasting. Through contrastive analysis, the numerical simulation results for the water inrush owing to damage to the water-resisting rock were found to correspond to those found using field tests. Therefore, this method can provide reference for underground engineering construction.

中文翻译：

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基于有限元法-光滑粒子水动力耦合的破损抗水岩体隧道突水分析方法

摘要 在钻爆施工过程中，耐水岩体被破坏会引起突水。隧道突水是工程中常见的人为地质灾害。传统的有限元法（FEM）在处理大变形问题时精度较差，离散元法（DEM）无法实现工程规模化操作。本研究基于LS-DYNA二次开发技术，采用Johnson-Holmquist损伤本构模型。在爆炸损伤区域使用流体网格，并引入光滑粒子流体动力学（SPH）来模拟流体。隧道远区采用实体网格计算，形成FEM和DEM耦合算法。以永连隧道为例，本研究模拟了爆破作用下隧道突水的演变过程。通过对比分析，发现阻水岩体破坏突水的数值模拟结果与现场试验结果一致。因此，该方法可为地下工程施工提供参考。