Abstract: Abstract:Against the problem of surrouding rock falling cavity and water inrush in mine shaft sinking through water bearing goaf, in combined with actual construction situation of return air shaft in Rundong coal mine, the paper provided the technology of “combined supporting and grouting fill” to make mine shaft smoothly through caving zone cavity; meanwhile in order to ensure the construction safety and construction quality of mine shaft, grouting in mine water bearing used roadway to form blocking water filling body for blocking the passage of water inrush. The results show that mine water yield changed from 50 square meters per hour to 0.5 square meters per hour after applicating the technology of grout-filling blocking water, the water plugging effect is obvious; at the same time after applicating the technology of “combined supporting and grouting fill” for supporting surrouding rock falling cavity, bearing capacity and deformation resistance of mine shaft surrounding rock in broken section significantly improve, and the wall is complete without breaking, supporting effect is significant.

Key words: Key words: mine shaft, mine water bearing used roadway, surrouding rock fall, combined supporting and grouting fill, water sealing