Abstract:

The anchoring characteristics of anchoring section of resin bolt in the coal mines are the key of bolt support design. The interaction relationship of bolt, resin and surrounding rock and the stress and the displacement distribution law are simulated and studied by the finite difference program FLAC3D, and also the variation of anchorage characteristics of anchoring section from elastic state to plastic state under the different loads. The result indicates that the axial force of anchoring section is negative exponential distribution along bolt axial direction, and also the shear stress of resin and rounding rock are negative exponential distribution along bolt axial direction. Finally the research results are applied to practice under mine well with monitoring force condition of bolts , and the results verify the correctness of the study conclusions.

Key words: resin bolt, anchoring characteristics, stress distribution, numerical simulation, mechanism of load-transfer