Abstract: The deformation damage of deep roadway is affected by many factors,and the steel pipe concrete(CFST)support technology can maintain the stability of the roadway to a large extent. In this paper,through CFST numerical simulation,the deformation characteristics of the roadway and the causes of deformation and damage are analyzed,and a steel pipe concrete simulation method considering the initial defects of the core concrete is proposed,which is used to analyze the mechanical properties of the steel pipe concrete support. Based on the simulation results,an optimized support scheme is proposed,including ring-shaped steel pipe concrete support,segmental fissure surrounding rock grouting and anchor rods. Comparative field tests show that the bearing capacity of the surrounding rock and the supporting structure is significantly improved after adopting the new repair technique,while ensuring a more uniform stress distribution within the rock mass.