分析和探讨了隧道围岩变形与围岩类别、开挖方法、支护时机及支护参数之间的关系；
The relationships among the deformation of surrounding rock masses, the class of surrounding rock masses, excavation method, time of support and parameters of the support are put forward.
研究结果表明，该地下隧洞针对不同围岩类别设计不同的支护方案和支护时机是合理可行的。
It has been proved rationale and feasible to use different shoring project and shoring time for different surrounding rock type.
然后，针对金川岩体的流变特征进行了理论研究，建立了非线性流变模型，通过拟合得出了最佳二次支护时机；
Then, theoretical study was carried out on the rheology of Jinchuan rock mass and a nonlinear rheological model was established. The best secondary support time was found by fitting.
然后，针对金川岩体的流变特征进行了理论研究，建立了非线性流变模型，通过拟合得出了最佳二次支护时机；
Then, theoretical study was carried out on the rheology of Jinchuan rock mass and a nonlinear rheological model was established. The best secondary support time was found by fitting.
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