Research on support technology of driving roadway under the influence of continuous fault fracture zone

In order to study the support technology of roadway excavation under the influence of multiple fault fracture zones, this paper takes 2101 transport trough of Donggou Coal Mine as the engineering background, and analyzes the surrounding rock variation rules at different stages during roadway excavation under the influence of multiple fault fracture zones through numerical simulation software. The results show that the main factors affecting the surrounding rock are vertical stress and unstable rock mass in the fracture zone. Through numerical simulation, the plastic zone is reduced by 58% after grouting and strengthening support, and the deformation of roof, bottom plate and two sides is reduced by 3.05m, 0.5m and 1.6m respectively. Due to the change of rock stratum caused by fault drop after breaking zone, it is necessary to strengthen the support of roadway roof. After supporting, the plastic zone is reduced by 40%, and the deformation of roof and two sides is reduced by 0.75m. The results of simulation analysis meet the requirements of support and provide a theoretical basis for mine construction. It also provides reference for the excavation of roadway under similar conditions.