In order to consider the damage effect of aging deterioration and water content weakened on the creep parameters of rock

a creep damage model is proposed

that is

the parameter correction and improvement of Nishihara model and the triaxial creep tests of basalt with different water contents are carried out. First of all

the creep regularities of rocks with different water contents are comparatively analyzed; and the mechanism of the influence of water content on the rock creep process is revealed. Secondly

in order to describe the rock creep process better

the aging deterioration effect and water content weakened effect are introduced. The damage variables and creep parameters are fitted by the experimental data. Finally

the calculated values of the model are compared with the experimental data. The results show that the initial creep value and steady creep value increase with the increase of water content. Furthermore

it is verified that the numerical calculation of the model agreed well with the experimental data by FLAC3D. The rock aging creep damage model proposed in this paper will provide a theoretical basis for the study of rock rheological properties.