Supporting Reinforcement and Stability Analysis of the Roadway Crossing the Fault in Deep Mining

Abstract

There is a F3 large fault with inclination close to 90° in the Xiling mining area of Sanshandao gold mine, and the entire middle roadway driving through the F3 fault. The surrounding rock is broken, so the stability of the surrounding rock is very poor in the process of roadway crossing, and the problems of collapse and large deformation appear. In order to ensure the safety of mining and construction, it is very important to put forward the support design scheme of advanced support bolt, U-shaped steel frame and shotcrete in order to ensure the stability of the surrounding rock based on the joint fissure statistics, the quality of the surrounding rock and the stress environment test. Through the numerical modeling, the stress, displacement and the distribution of the plastic damage zone of the roadway surrounding are analyzed during the tunneling process. The results show that the support system can effectively control the deformation and damage of roadway surrounding rock during the roadway crossing fault, and has good support function to the roadway surrounding rock in the surrounding area. It can guarantee the safety of personnel and equipment in the process of roadway excavation and postmining and transportation.