Abstract:The stability of roadway in fractured strata under complex stress conditions is of great significance to the safe production of underground mines. In order to study the influence of bolt-steel-mesh-shotcrete combined supporting on the deformation and failure of the surrounding rock of a complex broken roadway, a three-factor, three-level orthogonal design was established, which took the spacing of bolts, the spacing of cables and the thickness of shotcrete as variables. FLAC3D was used to simulate the stability of roadway under different supporting parameters. The results indicated that, among the factors affecting tunnel stability in complex fractured rock strata, shotcrete thickness is the most significant, followed by bolt spacing and cable spacing. Considering roadway stability and economic benefits comprehensively, anchor cables with a spacing of 2000 mm×3000 mm, resin bolt with spacing of 800 mm×1000 mm, steel mesh-reinforced shortcrete with thickness of 125 mm were used for anchor-net-spraying and anchor cable support. After the support, roadway stability was better and deformation was reduced. The research results provided technical guidance on determining the supporting parameters of roadway with fractured surrounding rock.