Research on Roadway Surrounding Rock Control Technology Using O-arch Combination Support Scheme

Abstract

project features in Zhengling Coal-mine, from the theory with practical point of view, this study analysis the key damage factors of the soft rock roadway. A new kind of support scheme, O-arch combination support scheme, is designed and used in central substation in Zhengling Coal Mine. FLAC software is used to simulate two different support programs. The roadway surrounding rock deformation is monitored. The results show that new support program can effectively control stability of complex soft rock roadway. Roadway plays an important role in transportation and production in coal mine. The roadway stability and surrounding rock deformation have a direct influence on the safety of coal mine. Appreciate support design is one of the most important method to control the growth of plastic zone and prevent the deformation and failure of roadway. The geological conditions of Zhengling Coal Mine, is complicated as a typical “three-soft” coal seam. There is a wide distribution range of soft rock in this area, and with a high in-situ stress, which lead to the original support design can’t control the deformation of roadway surrounding rock effectively. This problem affects the safety and production of Zhengling Coal Mine seriously. According to the field situation, this study analyzed the reason of roadway surrounding rock damage and designed a new support scheme for Zhengling Coal Mine. Both Flac numerical simulation and field monitor were used in this study. Results shown the new support scheme is effect.