| The advance of underground excavation and national defence construction towards deep part brings a series of problems of rock mechanics, which are characterized by'high temperature, high ground stress, high pore pressure and mining disturbance'. For temperature, it is a great menace to production and security. The author studies mainly on effect of temperature to creep of soft rock this paper.Creep forms part of rheology of soft rock, it is unavoidable for researching larger deformation to research characteristic of creep. Based on theory of creep model studied previously, a new creep model which is capable of not only showing influence of loading level, but also showing accelerating creep phase is established. At the same time, a traditional model of porous medium is improved, and temperature as a factor is introduced. A creep model of porous medium including temperature is established, which is applied to soft rock and a creep model of deep soft rock including temperature is got.By doing uniaxial creep experiments including temperature, some lows of effect of temperature to creep of soft rock is got, furthermore, the model established previously is verified and generalized to predict deformation. By doing triaxial creep experiments including temperature, the partial results from uniaxial experiments is verified again. A conclusion is drawn that with temperature increasing, creep deformation and creep velocity increases, and the extent of affect of temperature is depended on loading.A hypothetic engineering case is simulated by ANSYS, the phenomenon of creep is presented visually, and the conclusion previously is verified again. |
