Abstract
The roadway has to adapt to the surrounding rock movement compensation tracking anchoring force changes, strong anchor bolt, lightweight and Recyclable reuse, the advantages of economy and environmental protection. Compared with the traditional bolt and rock is prone to lack of cohesion, not suitable for supporting or prone to large deformation of roadway in soft rock, the anchoring force of unstable phenomenon. Therefore, it is of great theoretical significance and practical value to study the bolt of roadway. This topic is based on the. In this paper, starting from the ground experimental roadway bolt, combined with elastic-plastic mechanics, rock mechanics theory, using finite element contact analysis of roadway bolt, provide a theoretical basis for the design and production of the bolt, and the simulation results with the theoretical and numerical results are verified by the numerical test on the ratio, improved model and lay the foundation for optimization of bolt structure. The mechanical properties and influencing factors of resin anchoring agent were studied. The results show that the bolt is in a normal state when the bolt is subjected to tension, bending, torsion, shear and its combination, and the 4 position of the rod is easy to break. The stress distribution of the surface and the near part of the thread is changed significantly, and the stress concentration is obvious at the bottom of the thread. 5 stages can be divided into arch plate deformation; arch height must meet in order to ensure sufficient bearing capacity to a certain value. The geometry, the parameters and the mechanical properties of the bolt end member should match each other, so that the anchor rod is in a good state of stress. The resin anchoring agent should be matched with the rod body and the hole to ensure the good bonding property between the anchor rod anchoring agent and the anchoring agent. The research results have been applied to many kinds of difficult roadway, which greatly reduced the damage of the bolt support and significantly improved the effect of roadway support.
