The northern mining areas are extremely cold. To create a warm working and living environment, and to ensure the safety and normal production of the mines during the winter, effective measures must be taken.

Heid can offer a comprehensive and efficient wellbore anti-freezing solution for this technology. By adding an auxiliary fan on the side of the auxiliary shaft to counteract the natural wind pressure, it forcibly adjusts the airflow direction of the auxiliary shaft from exhaust to intake, achieving an intake volume of 60 m^(3)/s. Simultaneously, utilizing the positive pressure effect on the exhaust side of the auxiliary fan, it pushes warm air above 0℃ from the 1130-meter level main shaft connecting tunnel into the main shaft wellbore, then exhausts it to the surface, thereby providing thermal insulation and anti-freezing for the main shaft wellbore. Additionally, a high-efficiency far-infrared electric heating air furnace preheats the air entering the auxiliary shaft to 2℃ before it is sent underground, effectively preventing ice formation in the auxiliary shaft wellbore.