关键词: 动静载荷, 锚杆支护, 托板, 变形破坏, 力学响应

Abstract: Aiming at the problem of dynamic load failure of bolt support plate in deep mine roadway in Mongolia and Shaanxi, a drop hammer impact test-bed of bolt support plate is built in the laboratory, three kinds of commonly used bolt support plates in deep mine in Mongolia and Shaanxi are selected, the static and dynamic load mechanical properties are tested by servo pressure test machine and drop hammer impact test machine, and the static and dynamic load mechanical properties of three kinds of support plates are studied. The results show that the structure and thickness of the supporting plate will significantly affect its static and dynamic mechanical properties. The supporting plate with reasonable structure and large thickness has higher static load-bearing capacity and impact resistance. Under static load, the bearing capacity of a, B and C supporting plates are 212kN, 231kn and 276kn respectively, and the deformation is 14mm, 13.9mm and 12mm respectively. The bearing capacity of C supporting plate is high, mainly due to the reduction of arch height, and the four corners are not obvious; Under the action of impact energy, the peak value of the impact force of the supporting plate is slightly higher than the static load bearing capacity. The supporting plate with high bearing capacity has strong impact resistance. After being affected by the impact energy, the supporting plate is dominated by structural deformation, and the peak value of the impact force changes little, while the supporting plate with low bearing capacity has a sharp increase in the impact force of the supporting plate under high impact energy due to the collapse of the arch structure.