Abstract: More and more metal mines come into deep mining,which are faced with double difficulties in thermal groundwater hazards and ventilation.Based on the principle of temperature difference driving ventilation,it is proposed to transform the potential energy and heat energy of underground hot water into the kinetic energy and internal energy of air flow by using a hydraulic ventilating heat exchanger,and the related numerical simulation was made by MATLAB,and the related parameters were optimized.The results show that the heating effect is positively related to the head of thermal groundwater,the inlet temperature of the heat exchanger,the temperature of the thermal groundwater and the height of heat exchange.Its importance ranks as the head of thermal groundwater,followed by the temperature of the heat exchanger,the temperature of the thermal groundwater and the height of the heat exchange.Under the external condition that the head of thermal groundwater 260 m,the temperature of geothermal water at 55 ℃,and the initial temperature of air at 24 ℃,the air volume of the heat exchanger reached 54 m3/s,and the temperature of air outlet is about 10 ℃.

Key words: Geothermal water, Hydraulic ventilation heat exchanger, Temperature effect, Numerical simulation