Numerical simulation of supporting scheme in deep soft roadway

In order to determine a roadway supporting schemes of coal mine safety production, base on the background of the excavation in the mining gateway of 601 fully mechanized coal mining face in a coal mine, prestressed truss supporting scheme and non-prestressed truss supporting scheme of surrounding rock of roadway displacement, stress distribution and plastic zone of surrounding rock are compared and analyzed by FLAC^2D numerical simulation software of theoretical calculation. The results show that using the original support scheme, stress concentration occurs in tunnel roof , roof corners and both sides of the roadway. Plastic zone is large and roadway undergoes great deformation. Displacements on both sides of the roadway are up to 1m. When adopting prestressed truss support, the stress distribution in the tunnel roof is in good condition, but concentration of stress occurs in the roof corners and sides of the roadway rock stress. Plastic zone is distinctly smaller and the deformation of roadway improves substantially. Deformation displacements on both sides of the roadway are reduced to 0.0106m, so the deformation of deep soft roadway decreased significantly. A feasible method for the design of the mining gateway support is provided and performs well in practical application.