Taking the 2-205 fully mechanized top coal caving face of Tenghui Mine as the background, combined with the characteristics of the large cross-section and partial roof fragmentation of the 2-2051 mining roadway props, it is proposed to use a composite support method of grouting anchor cables and single hydraulic props combined with π beams to reinforce and support the roof fragmentation area, in order to ensure the safety of the roadway roof during mining. By analyzing the distribution law of advanced support pressure in the 2-2051 mining roadway, guidance is provided for the reinforcement and support design of the 2-2051 mining roadway. Based on the analysis of the principle and strength of grouting anchor cable reinforcement support, and the calculation of the reinforcement support strength of the 2-2051 mining roadway, the design of the roadway support plan was completed. The research results indicate that the composite support method of using grouting anchor cables and single hydraulic props combined with π beams, combined with the structural characteristics of the tunnel surrounding rock, the distribution law of advanced support pressure, the principle of grouting anchor cable reinforcement support, and the calculation of tunnel reinforcement support strength, has analyzed and calculated reasonable support plan parameters, and targeted the implementation of the reinforcement support plan for the broken roof area. The on-site industrial test results show that the use of anchor injection reinforcement support technology in the fractured area of the mining roadway roof effectively controls the deformation of the roadway roof, which can meet the requirements of safety and efficiency in the mining face. It has engineering promotion value for other mines with similar conditions.