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针对埋深大、结构面复杂的隧洞稳定性及支护效果,应用离散元法对建立的节理岩体隧洞模型分别模拟隧洞开挖与支护后的隧洞围岩应力及位移变化。结果表明,隧洞开挖后围岩变形稍大,并需考虑地下水对隧洞围岩的影响,需对隧洞进行支护处理;支护后的隧洞围岩位移变形减小,围岩稳定性得到增强。
According to the stability and supporting effect of the tunnel with large buried depth and complicated structural surface, the discrete element method is used to simulate the stress and displacement of surrounding rock of the tunnel after excavation and support of the jointed rock mass tunnel model respectively. The results show that the surrounding rock deformation is slightly larger after tunnel excavation, and the influence of groundwater on the surrounding rock of the tunnel should be considered, and the tunnel should be supported and treated. The displacement and deformation of the surrounding rock after tunneling are reduced, and the stability of the surrounding rock is enhanced .