Abstract: Aiming at serious floor heave problem of Gubei Mine 11-2 belt conveyor downhill, by analyzing the mechanism of floor heave of the mine, the rock mass physical mechanics analysis and stress distribution analysis of surrounding rock damage area, it concluded that floor characteristics of surrounding rock, hydrological effect, strength of supporting structure were the main influencing factors of floor heave damage. The study determined floor heave control scheme of bolt. Through field monitoring and analysis of deformation parameters, it effectively controlled deformation of floor heave, and achieved good reinforcement effect.