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. Based on the Nishihara model, a new nonlinear creep model of rock is established.Firstly, based on the analysis of macroscopic and mesoscopic creep processes, the concept of rate of change of creep parameters is put forward , A unified formula for rock creep parameters changing at constant creep and accelerating creep stages is established.Using this nonlinear creep parameter and the yield softening process of rock, the nonlinear model of rock is established based on the Nishihara model Elastic-viscoelastic-viscoplastic creep model.Finally, the uniaxial compressive creep test results are compared with the numerical results to verify the correctness of the model for describing the whole process creep deformation and failure of the rock.