Comparative study on impact resistance performance of new type of laminated energy-absorbing bolt and conventional high strength bolt
GUO Dongming
XIAO Bofeng
ZHAO Zhifeng
YE Guichuan
LIU Jiahua
TANG Gengfu
Abstract：Aiming at the failure of bolt and its components caused by rock burst,a new type of bolt with laminated energy absorbing components is designed.To study the energy absorption and impact resistance characteristics of the new laminated energy-absorbing bolt under dynamic impact conditions,the performance of the new laminated energy-absorbing bolt and ordinary high-strength bolt under different impact energies was compared by dynamic impact test and numerical simulation.The results show that the impact force and strain at the bolt top fastening end and the bolt tail nut can be significantly reduced through the laminated component,the deformation degree of the bolt under impact load can be effectively reduced,and the structural integrity of the new bolt can be im-proved;when the impact energy is less than 30 kJ,the lamination as the main energy-absorbing component absorbs most of the im-pact energy;the introduction of laminates effectively enhances the energy absorption and impact resistance of the new bolt.
Keywords：rock burstlaminated componenthigh strength boltnumerical simulationenergy absorbing boltimpact resistance
Publication Date：2025-02-19
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 109-117 )