Numerical Experiment Research on Failure Characteristics of Anchored Rock With Negative Poisson’s Ratio Bolt

Abstract With the continuous increase of mining depth and engineering burying depth, the nonlinear physical and mechanical phenomena exhibited by rock are also more complicated. The load value often exceeds the yield strength of the traditional Poisson's ratio supporting materials, causing the supporting body to fail. Therefore, the bolt still needs to further in-depth research on new materials. In this paper, the rock model with a negative Poisson’s ratio bolt had been established, the material properties of negative Poisson’s ratio and the working principle of RFPA software were introduced, and RFPA software was used to study the reinforcement effect of negative Poisson's ratio bolt on the rock. The numerical experiment results show that, compared with the positive Poisson's ratio bolt, the negative Poisson's ratio bolt can significantly increase the bearing capacity of anchored rock, enhance the friction between the bolt body and the surrounding rock, and limit the rock movement. The anchored rock with negative Poisson’s ratio bolt can absorb more energy. Negative Poisson's ratio material is one of the future development directions of bolt material.