The Influence of Faults on The Deformation Law of Surrounding Rock Under Mining-induced Stress Field

Abstract

With the continuous growth in the demand for coal resources, coal mining has become an important direction for resource development. As a typical representative of complex geological structures, faults significantly increase the safety risks and engineering difficulties during the mining process. The geological structure in the fault zone is complex, and the mining technology faces safety risks such as water inrush and instability of surrounding rocks. However, this area is rich in coal resources, and its rational development is of great significance for ensuring energy supply and improving resource utilization. This study, taking the fourth mining area of Sanyuan Coal Mine as the engineering background, through detailed geological structure detection and three-dimensional stress field numerical simulation, proposed the variation law of surrounding rock of the roadway under the influence of mining in the fault zone. The conclusion is that under the condition of being close to the fault, the maximum vertical displacement of the roadway is 111.6mm, which is approximately 58.8% larger than that in the area far from the fault; the maximum horizontal displacement of the coal pillar side and solid side of the roadway reaches 100.4mm and 55.6mm respectively, which is approximately 79.3% and 75.4% larger than that in the area far from the fault.