Abstract:After filling the upper goaf of Hongtoushan Copper-Zinc Mine, the winter preheating and anti-freezing system is facing failure. By using multiple middle shaft and roadway projects in the upper constant temperature zone and warming zone, the exposed area of preheating rock wall is increased, and the reconstruction and feasibility study of circulating preheating ventilation system are carried out. The results show that the preheating circulation ventilation system is reconstructed in Hongtoushan copper-zinc mine, and the west air shaft is changed into the air inlet shaft. The inlet air temperature is -25℃ and above. The total amount of preheating air in the preheating circulation ventilation system is greater than 124.3m3/s. The air temperature can reach 4.43℃ after preheating with the total air volume of 120m3/s in winter, which is 2℃ higher than that of the anti-freezing well. The preheating effect of Ventsim thermal simulation is remarkable, which can effectively solve the problems of shaft freezing, shaft jam and water pipe freezing in winter, and can save 7.54 million yuan per year in energy consumption economy.