Abstract: Based on the centralized track roadway of Shuguang mine,the influences of surrounding rock properties,tectonic stress and water on floor heave were analyzed.Combined numerical simulation and engineering practice,the stress distribution,development of plastic zone were analyzed under horizontal stress when no supports were in the floor.This paper described the mechanism of the floor heave and propsed the measures to control floor heave of roadway.By optimizing the existing support parameters,the carrying capacity of coal in the roof and two sides was improved.Through eliminating the effects of water on the floor,the strength of bottom rock was consolidated and its bending deflection was controlled.