Determination of average air leakage in ventilation ducts of mines in the Polar Region

Abstract

In the ventilation network of any mine, part of the total unproductive air flow is lost in the area of the main fan units. This category of leaks always has the greatest negative impact on the mode of operation of fans and the efficiency of ventilation of underground workings. In the harsh climate of the Polar region, sucking of outside air in winter causes intensive freezing of ducts, blocking devices and fan impellers. The applied methods of sealing of ventilation structures do not completely exclude external air losses. Therefore, when choosing the main ventilation fans, these losses must be taken into account. ...