Abstract: In view of the serious problem of floor heave in the No.1 return air main roadway of Yuwu Coal Industry under the disturbance of high stress, the mechanism of floor heave and its stability control method were systematically studied by combining theoretical analysis, numerical calculation and field test. The theoretical calculation results show that the failure depth of high-stress roadway floor reaches 1.35m, and the sliding force on the sliding surface of the floor reaches 3.11MPa, which exceeds the ultimate tensile strength of sandy mudstone and leads to floor heave. From the perspective of floor heave control in high-stress roadway, a floor heave control technology is proposed, in which the combined support of the roof and floor reinforced anchor cable and the two sides of the roadway are combined. The numerical simulation results show that the floor heave volume of the roadway can be reduced by 67%, which can effectively control the floor heave and provide support for the overall stability of the roadway. Through the field test, the proposed floor heave control method can reduce the roof subsidence value of the return air main roadway by 37%, the floor heave value by 72%, and the deformation of the two sides by 53%, which effectively ensures the stability of the return air main roadway. The research results have important practical significance for guiding the control of roadway floor heave under high stress environment in deep mine.