关键词: 钢管混凝土支架, 动压影响, 大变形巷道, 围岩稳定

Abstract: Nanguan Coal Mine West Wing track Lane, West Wing belt lane and West Wing return air roadway are typical large deformation and difficult to maintain roadway under dynamic pressure. In order to ensure the safety production of coal mine, roadway excavation is in a state of frequent repair, which requires a lot of manpower and material resources for repair. In order to solve the support problems of three main roadways in Nanguan coal mine, based on the analysis of surrounding rock conditions, original rock stress and deformation characteristics of original support, a composite support scheme based on concrete-filled steel tube support is proposed. Field comparative test is carried out in the mining affected area by 3209 working face. The test results show that, compared with other reinforcement methods, the deformation of surrounding rock in the support section of concrete-filled steel tube support has been effectively controlled, and the designed support scheme of concrete-filled steel tube support is suitable for dynamic pressure roadway support in Nanguan coal mine.