The Theoretical And Numerical Simulation Study On Rheologic Damage And Stress Evolution Of Roadway Surrounding Rock

With the deepening of depth in coal mining, mining dynamic phenomena occur more frequently. The mechanism of the dynamic phenomena and the methods of prediction have been done in lots of research work, it is a key point to prevent mining dynamic phenomena. In this thesis, the experiments and theoretical analysis are adopted to reveal the law of coal and rock dynamic damage evolution. Advanced experimental equipments are used in the experiments to obtain the mechanics properies of coal and rock which are analyzed under the thermodynamic and damage mechanics theory to achieve the relationship between the damage and stress-strain. It also attributes to establish the model of dynamic damage evolution to reveal the common essence in the creep and relaxation phenomenon. By analyzing kinds of dynamic phenomena in coal and rock with the dynamics theory, it explains the law of dynamic phenomena in coal and rock and provides new theory and method to prevent and predict the dynamic phenomena. Developped a numerical simulation software in stress field of roadway, it can simulate the process of damage which means it can simulate the dynamic process from the creep to the sudden break. The research system is supported closely by the experiment, theory and numerical simulation to reveal the essence of dynamic phenomena of coal and rock, which also give the theoretical guidance and support on the prevention of coal and gas outburst.