Research on the Mechanism of the Passive Reinforcement of Structural Surface Shear Strength by Bolts under Structural Surface Dislocation

In order to study the local deformation of an anchor bolt and improvement in shear strength a structural surface under misalignment anchorage structure surface, FLAC3D software was used simulate granite, sandstone, coal specimens with angles 90° analyze damage anchoring agent changes axial forces bolts surface. The results show that near had significant characteristics surface; is, length area approximately equal damaged agent, stress on coupled tensile–shear state when reached yield state. For fully grouted bolts, it this feature made increase rapidly small displacement so stable caused by This is referred as passive which mechanism bonding section control realize stability rock mass.