Abstract: Abstract: this article is based on the return air alleys of ventilation shaft which gets crushing plate and high confined water special geological conditions in Jin ding mine of Yi colliery .To study the reasons and mechanism of floor heave of roadway, and through the combination of shallow and deep way of grouting to carried out the floor heave of roadway floor management. The results show that the roadway floor away from the Cambrian limestone water is only 39 m, under the influence of the construction drilling in the early stage, the Cambrian limestone water is shallow import floor, the roadway floor heave has happened under the combination of mine pressure and high pressure water. Through the method of combining roadway bottom aquifer of shallow deep and shallow overburden bed separation grouting to reinforce the Cambrian limestone. Through this way to reduce the roadway water inflow and control the floor heave of roadway effectively.

Key words: The key word: Broken Floor, High Pressure Water, Harness of floor heave, Grouting reinforcement