To compensate for the lack of prediction models for rock creep failure time under conventional triaxial compression conditions and their low accuracy

based on the Norton creep constitutive relationship

a new rock creep failure time prediction model under conventional triaxial compression conditions is established by replacing the creep stress of Kachanov rock creep failure time function with a constant creep rate function. A method for determining the model parameters is proposed and its influencing factors are analyzed. The conventional triaxial compression creep test of sandy mudstone was carried out

and the creep failure time test data of five different types of rock were statistically analyzed to verify the rationality and accuracy of the new model. The results show that under the conventional triaxial compression conditions

the logarithm of the constant creep rate of rocks is linearly related to the logarithm of their creep failure time. The new model can weaken the adverse effects of heterogeneity between samples on the prediction results

and its applicability is more extensive compared to the prediction model established from the perspective of creep stress. The creep test results of six different types of rock are basically consistent with the prediction results of the new model

which verifies its accuracy and rationality.