Numerical modelling of the performance of bolted rough joint subjected to shear load

With the increasing complexity of engineering geological conditions, problem tensile-shear failure bolts is becoming more serious. Accurate modelling performance bolted rough joints subjected to load essential for support design. In this paper, based on theoretical criteria bolt failure, mechanical model Pile element in FLAC3D program modified, and accuracy modified verified by numerical experimental rock joint shear tests. Then, under studied. On basis results, interaction characteristics between surrounding rock, distribution evolution force resistance, surface stress are revealed. Meanwhile, influence normal roughness coefficient (JRC) investigated. The research results anticipated give a useful guidance design optimization bolting underground engineering.