To address the stability challenges when large-section chambers are excavated in deep mining,this study employed numerical simulations to investigate excavation sequences and optimize support parameters for large-section chambers.A distribution and excavation model for large-section chambers was established,and 16 excavation schemes were designed based on principles such as roof first,then walls walls first,then roof and simultaneous walls and roof as well as the cutting approach of integrated excavator on mine site.The study analyzed the effects of 5 different support types and optimized support parameters based on the simulation results.The findings indicate that the roof first,then walls excavation sequence results in minimal disturbances when considering factors like plastic zone changes,surrounding rock convergence,and excavation equipment.Bolts,cables,and concrete lining significantly enhance chamber stability and load-bearing capacity;however,deformation persists in the wall,middle,and middle areas of floors of the chamber.It is recommended to increase the density of bolts and cables and supplement with grouting for reinforcement.