关键词: 羊场湾煤矿, 上行开采, 断面形状, 数值模拟

Abstract: In order to study the selection of reasonable roadway cross section shape under the condition of upward mining in Yangchangwan Coal Mine, through theoretical calculation of the "two zones" height after the second coal mining and field measurement of the failure range of overburden rock in goaf, the advantages and disadvantages of different roadway cross section shapes and their application range are summarized. FLAC3D numerical simulation software was used to simulate and study the stress and deformation failure characteristics of the surrounding rock under the condition of upward mining, and the field verification was carried out. The research shows that after the second coal mining, the height of the fracture zone is about 38.75-49.95m, the integrity of surrounding rock is low, and the upward mining roadway is located in the fracture zone. The simulation results show that the stability of the surrounding rock is the best in the straight wall semi-circular arch section, followed by the micro-arch section and the worst in the rectangle section. Combined with numerical simulation analysis and field verification, the micro-arch section is the most suitable one.