关键词: 采空区, 错层位, 沿空掘巷, 巷道布置, 巷道支护

Abstract: Inordertoresearch the problemofthe roadway layout onthecondition of external-misaligned stagger arrangement,according to the research status of domestic gob-side entry driving, the top coal stress division of 302 working face was divided by theoretical calculation. Numerical simulation analysis compares the stress field and plastic zone distribution between the condition of direct excavation and goaf backfilling. The stress field and plastic zone distribution of direct excavation face, large deformation setting of working face and filling simulation of goaf are compared and analyzed by Flac3D numerical simulation software.The result shows that the calculation error of working face in upper section of direct excavation is large.The calculation error of excavation face is reduced after large deformation treatment, and the filling simulation of goaf is the most accurate because it accords with the actual conditions. Finally, considering the theoretical calculation and the numerical simulation results of the filling process in the goaf, the horizontal offset of the lower section along the bottom roadway is determined to be 3m. Joint space support relationship between adjacent roadways is proposed by combining the spatial positional relationship of the wrong layer. The experimental results were verified by Flac3D numerical simulation software. The final result is that the roadway layout and support scheme is beneficial to reduce the size of the coal pillars, improve the resource recovery rate, and at the same time, it can control the adjacent roadway between the sections.