Abstract: Wulonggou Gold Mine is an old mine with many years of production.Due to many years of production in the mine,the ventilation system is relatively complex,and there are many underground diesel equipment.The ventilation in the middle and section of the current production is not smooth,and there are phenomena such as channeling and running wind.The mine ventilation system is divided into 3 320~3 270 m ventilation system,3 270~3 220 m ventilation system and 3 220 m ventilation system.Ventsim software was used to simulate the ventilation process of the new scheme.Practice has proved that the optimized ventilation scheme greatly improves the mine ventilation conditions and the mine ventilation efficiency.

Key words: Reconstruction and expansion of mine, Visualization dynamic simulation, Dynamic management, Ventilation efficiency