The moisture content of rock signi cantly in uences its time-dependent deformation behavior. This paper studied the different properties of the creep behavior of sandstone under saturated and dry conditions and their impact on the time-to-failure(TTF) through multistage creep tests. The results show that under an identical driving stress ratio (not identical creep stress), the dry specimens' creep strain and steadystate creep rate are relatively higher than those of the saturated ones. Nevertheless, the water-saturated specimen has a shorter creep strain path and TTF due to the softening effect of water. It is evident that in terms of creep deformation and creep rate, the impact of creep stress is much more signi cant than that of moisture content; however, in terms of creep TTF, the moisture content of sandstone plays a dominant role. The rationality of the generalized Kelvin, Burgers, and power-law creep models was evaluated based on the experimental data. The power-law model was found to be capable of tting the test data, and better predicting sandstone creep deformation than other two models. Finally, based on the assumption of a critical strain value ε cri , a method for predicting creep TTF from limited laboratory data was proposed, providing a foundation for incorporating TTF prediction into continuum numerical simulations.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.