Abstract: In view of the serious deformation of roadway floor heave in track lane gob-side entry retaining of 1204 working face of Zhongxing Mine, which is influenced by the two mining dynamic pressure of the face, the analysis shows that the floor heave is mainly formed by the crippling load of large-scale structure in the mining period, and the post peak creep of rock during the gob-side entry retaining and two times mining period. In light of this situation, the plan of steel pile arrangement is proposed. It can not only weaken the extrusion to the rock mass in the tunnel by its own bending and shearing behavior, but also improve the whole stability of roadway bottom. Compared with bolt support, steel pile can effectively reduce the deformation of floor heave, and has significant technical and economic value.