Abstract: According to the water gushing phenomenon in the granite-mudstone-limestone boundary area (1470-1850 m) in the middle part of the secondary adit of Tashan mine of China Coal Group, the grouting and water blocking treatment was carried out.Through the way of combination of deep and shallow hole, the cement-water glass double liquid slurry was main in shallow hole and run-off area, and single liquid cement slurry was Main in deep hole, after the end of the diversion drainage. The results showed that the water inflow decreased from 46.2 m³/h to 3.4 m³/h, and the reduction rate was 92.6% . The water gushing crevice is effectively blocked, and the well wall is reinforced, and the water blocking effect is good.