Abstract:On the basis of summarizing existing anchoring theory research results, the mechanism about full grouted bolt and end-anchoring bolt was discussed in this paper. Then FLAC3D software was applied to establish the three-dimensional mechanical model of anchor bolt, and mechanical characteristics of the bolt was analyzed under different prestressing forces (0, 10 kN, 60kN), revealing that the stress distribution tended to concentrate in the front part of the bolt when prestressing force increased. In addition, relative displacement on the surface of the rock model under prestressing forces of 0 and 60 kN was presented. The analysis shows that the relative displacement is centered at the anchor point, within a range of 1 m. The maximum relative displacement peaks at the center and the relative displacement experiences a sharp decrease as the range increased. Finally, the conclusion is verified rationally by the on-site axial force measurement test.