Abstract: During the excavation process of the horizontal roadway of the filling well in Gushan Mine, local collapse of the vault occurred and accompanied by a large amount of water gushing. By analyzing the causes of water inrush, a comprehensive response plan of ' roadway closure + source control ' was formulat⁃ ed. The advanced directional drilling technology is used to penetrate the roadway and grout the roadway. Af⁃ ter the closure, several branch holes are constructed to explore the water inrush channel, and the surround⁃ ing broken surrounding rock is reinforced by high-pressure grouting to completely block the water channel, and the water plugging rate reaches 100 %. After the implementation of the measures, the roadway excava⁃ tion safety passed the control area and the high water-bearing area, which has certain reference value for similar projects.

Key words: roadway water inrush, remote directional drilling through lane, roadway closure + source control