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中文摘要：
在西原模型的基础上，研究建立了一种新的岩石非线性蠕变模型．首先，在分析岩石宏、细观蠕变过程的基础上，提出了蠕变参数变化率概念；以此为基础，统一建立了等速蠕变和加速蠕变阶段的岩石蠕变参数变化公式．然后，利用该非线性蠕变参数以及根据岩石的屈服软化过程，以西原模型为基础，建立了岩石的非线性弹-粘弹-粘塑性蠕变模型．最后，将单轴压缩蠕变试验结果与数值计算结果对比，验证了模型对于描述岩石全过程蠕变变形破坏的正确性．
英文摘要：
Based on the Nishihara model, a new nonlinear creep model of rock is proposed. Firstly, the creep process of rock on macro-scale and meso scale is analyzed; and a new parameter, the change rate of creep parameter, is put forward; and the formula is established unifying the secondary and the tertiary creep stage. Secondly, by using the nonlinear creep parameter and according to the yield softening process, a new nonlinear elasto viscoelasto-viscoplastic creep model of rock is established. Finally, by comparison of the uniaxiat creep test results and the numerical calculation, the model is proved to be correct for modeling the complete nonlinear creep deformation and failure process.
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