Abstract: Sanshandao Gold Mine is one of main mines in Shandong Gold Group，which has entered deep mining and its main excavation depth has exceeded 1000 m away from the surface.Water-bearing fissure zone with 46 m³/h inflow are found in -1 070 m level working face in blind shaft excavation project，and how to propose a rational water conservancy project to ensure construction safety is becoming an urgent issue to be solved.Based on the background above，the design parameters and implementation plan of advance downward grouting were optimized，with the proper equipments and materials adopted.Grouting operation of 90m high was carried out by three times after observation of water inrush area and determining proper arrangement of construction sequence.Favorable water plugging effect is achieved by the on-site implementation of grouting plan (total water inrush volume less than 0.5 m³/h)，which can guarantee excavation engineering safely passing water-bearing fissure zone.The above grouting method has certain guiding significance to similar water inrush prevention projects in metal mines.

Key words: Metal mine, Deep mining, Prevention of mine water inrush, Kilometers deep blind shaft, Advance downward grouting