关键词: 特厚煤层, 支护参数, 围岩控制, 数值模拟

Abstract: In order to study the stability control technology of the surrounding rock of extra-thick coal seams in a mine in Datong，Shanxi Province，and to ensure the safe and efficient excavation of the road⁃ way，based on the excavation working face of the coal mine，a combination of numerical simulation and on�site engineering practice was adopted to systematically study the stress and deformation evolution laws of the surrounding rock of the thick coal seam roadway under the influence of excavation disturbance. Based on the mechanism of the influence of the supporting structure on the stability of the surrounding rock，the supporting parameters of the surrounding rock at the excavation working face were optimized，and then a comprehensive stability control technology for the surrounding rock of the thick coal seam excavation work⁃ ing face was proposed，with the core of high-strength anchor rods and anchor cables. The results show that as the excavation length of the thick coal seam roadway increases，the stress and deformation of the cross�section at the connection point between the supporting section and the unsupported section of the surround⁃ ing rock continuously increase，and tend to stabilize when the excavation length increases to 6 meters. In⁃ creasing the pre-stress of the anchor rods can significantly increase the amplitude of the stress continuous band and maintain its distribution range. After the implementation of the surrounding rock stability control technology for the roadway of the thick coal seam excavation working face in the field，the deformation of the roadway has been effectively controlled，verifying the reliability and applicability of this technology. The research results provide important reference value for safe tunneling in similar conditions.

Key words: extra-thick coal seams, support parameters, surrounding rock control, numerical simula? tion