The long-term stability of rock mass engineering in deep stratum rock engineering are closely related to the aging deformation characteristics.Hard rock under the conditions of high geo-stresses presents obviously rheological property.Triaxial rheological tests under different stress paths were carried out on TAW-2000 rock machine.By using the Drucker-Prager yield function we introduce the strength parameters C

φvalue to the Nishihara model one-dimensional creep equation

derived three-dimensional creep equation to describe the creep process of granite

and analyze the change law of deformation parameters of Poisson’s ratio and strength parameters Candφ.According to the triaxial rheological tests results

the rheological parameters of different confining pressures are obtained by nonlinear least square

and according to the distribution law of the parameters we get the relationship between rheological parameters and stress and time.Finally

the model can be used to study the creep properties of granite.The results show that the model can closely reflect the creep characteristics of the rheological parameters of granite and the weakening of rheological parameters with stress and time

and the results provide new research ideas and research methods for the long-term stability of rock mass engineering in deep stratum rock engineering.