Abstract: To solve the control problems of gateway floor heave during the mining period,the prop bottom beam structure,formed by longitudinal channel steel beams,horizontal channel steel beams and single hydraulic prop,were mounted on gateway floor which affected by the dynamic pressure.So roof pressure was transferred from roof to floor by the single hydraulic prop,which took advantage of its high support resistance to achieve floor heave control.The method,with high supporting strength,simple operation,minimal impact on production,is an effective method for floor heave control during mining.