Study on iterated damage and swelling evolution of rock

The law of rock damage evolution is concluded by analyzing iterative evolution characteristics in the process of rock compression deformation using the strain equivalence hypothesis.The damage evolution process of chaotic characteristics is analyzed using the iteration method after a rock damage constitutive model is developed.A statistical mechanical model is developed based on the microstructure of a scanning electron microscope to analyze the physical and chemical effects of soft rock swelling.The results show that the damage evolution model based on the micro-defect iterative can describe the rock compression deformation damage evolution law, and the proposed strain softening constitutive model agrees well with the experimental data.The physicochemical effects of soft rock swelling can cause finite or infinite physical phase transitions, as well as cause the soft rock mass to enter an unusually complex glassy transition state, which is highly consistent with the complexity of the soft rock swelling mechanism.