Stability Control and Support Technique of Surrounding Rocks in Deep High Stress Connecting Chambers of Shaft

For the problems of surrounding rock stability and support control in high stress and deep vertical shaft connecting chambers, through surrounding rock sampling survey of chamber and indoor physical and mechanical tests, we select the surrounding rock chambers calculation parameters based on Hoek-Brown strength criterion by using GTS chamber to carry out surrounding rock displacement and stress field numerical simulation analysis during group excavation, and propose the optimization for chambers support plan. By surrounding rock surface convergence monitoring, we determine the best time lag grouting for surrounding rock, and surrounding rock deformation and support structures of the measured force verify the feasibility of support and meet the production needs.