Study On Nonlinear Creep Law Of Deep Rock

With the development of coal mining's depth, the rock is under the action of high ground stress and high temperature, the problems of tunnel tunneling, supporting and maintenance are more and more outstanding. Most of all, the high ground stress makes the rock deform largely and it threats the safe work seriously. Meanwhile the repeated supporting for tunnels brings about a lot of economic losses.Creep is a style of rheology and the main reason of the large deformation. So if you want to study the large rheological deformation, study the creep features first. As creep models are based on a great many of experiments, the facts influencing the creep are studied by multi-group uniaxial experiments and triaxial experiments in this thesis. It is proved that the main fact is stress deviation, moreover the nonlinear function among creep, stress deviation and time is established. The function is the nonlinear creep model.As a new way, scientific calculation is wildly used in various areas. The creeps of rocks in different depths are calculated by ANSYS in this thesis. The phenomena of creep experiments are recurred by the calculation results.