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中文摘要：
大量工程实践表明，岩体工程开挖后的应力调整和变形并不是瞬时完成，本文采用大型有限元工程模拟分析软件ABAQUS，模拟二道垭隧道的开挖与支护过程，研究隧道开挖后考虑不同的应力释放比例后再支护时，围岩的变形及锚杆的受力情况．计算结果表明：对于松软岩层来说，考虑应力释放后再支护的计算结果更好地反映工程围岩的变形和破坏特性．
英文摘要：
A large number of engineering examples show that the stress adjust and displacement of rock mass during excavation are not completely instantaneous. The FEM numerical ABAQUS is used to simulate the excavation and support process of the Erdaoya tunnel. The mechanical behavior of the surrounding rock mass and bolts under different stress release ratios is obtained from numerical simulations. The results show that the calculation results for consideration of stress release is better for soft rock, in reflecting the deformation and its danmge character of engineering.
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