Abstract: In order to analyzing impact influence of conglomerate caving on deep roadway，dynamic load was applied on upper boundary of model to simulating the influence of conglomerate breakage on surrounding rock stability of 1410 upper roadway with FLAC^3D．Numerical simulation and theoretical analysis obtained maximum principal stress and elastic strain energy distribution rule at different moments which was basically accordance with field monitoring．Timely obtaining stress and elastic strain energy accumulation rule could provide theoretical reference for safe mining．