The Application of Floodgate Wall in Special Large Water Inrush Control of High Pressure and Soft Coal Roadway

Based on water inrush regulation project of 112124 heading face and a large number of hydrological geological data in Huangsha Coal Mine, the article makes application research and practice on the difficulty of the project and the coming technical challenges. Due to the soft coal seam, low strength, high water pressure, the aggregate curtain wall is repeatedly breakthrough after the realization of the several times roadway closures. In accordance with the actual hydrological data, the paper determines the limit bearing strength of bursting water roadway coal seam, reasonably determines floodgate wall pressure, through pressure-dividing and decreasing flow effect of floodgate wall, the aggregate curtain wall pressure of water inrush roadway and coal seam is reduced, it achieves successful closure of roadway at high pressure and soft coal roadway special large water inrush plugging. Through grouting reinforce aggregate curtain wall, and taking other steps, it fast and efficiently control special large water inrush.