Experimental Simulation of the Energy Absorption Characteristics of Laminated Rubber for Rock Dynamic Impact Protection
摘要
To effectively control and reduce engineering dynamic disasters such as rockfalls, instability of underground chambers, and rockbursts in deep, high-stress rock masses, this research proposes a new type of energy-absorbing rock bolt. This bolt, designed for hard rock in deep mines, incorporates laminated rubber. The energy-absorption effect of the new bolt primarily depends on the performance of the laminated rubber. To systematically evaluate rock the laminated rubber’s energy absorption characteristics against rock impacts, this research employed Ansys numerical simulation software to simulate Hopkinson pressure bar impact compression tests. Impact tests on laminated rubber specimens, conducted under various impact air pressure conditions, revealed the material’s energy absorption behavior and efficiency. The results show that the energy absorbed by the laminated rubber increased linearly with incident energy, indicating a constant ratio of absorbed energy to incident energy. There is an optimal absorption capacity for laminated rubber materials of different thicknesses; the optimal thickness is between 16 and 24 mm for an incident energy range of 600 to 800 J. These findings will provide theoretical and empirical support for the development of energy-absorbing rock bolts.