关键词: 煤岩, 冲击地压, 动静载荷, 损伤演化, 试验研究

Abstract: Based on the servo triaxial compression test system of coal and rock mechanics and acoustic emission monitoring method, the different loading mode tests of coal and rock in hujiahe mining area are carried out, and the macroscopic mechanical performance and damage characteristics of coal and rock under uniaxial, conventional triaxial and dynamic static load combination tests are compared to explore the mechanism of induced rockburst. The results show that under the conventional triaxial condition, with the increase of confining pressure, the strength of coal rock increases gradually, and the energy storage capacity of coal rock increases gradually; with the increase of dynamic load frequency, the strength degradation of coal rock becomes more obvious, and the coal rock changes from plastic deformation to brittle failure after the dynamic load disturbance; the dynamic load damage is more severe and rapid than the static load damage, which makes the coal rock in failure There are obvious differences in forms. The whole coal rock is broken into several coal blocks with different particle sizes, and some areas are ground into powder.