Centrifugal fan in the ventilation system of a mine

When taking into consideration the rich resources of hard and brown coal in Poland and the necessity of exploring deeper and deeper deposits, the functioning of machinery working in pit shafts is of great importance, also machinery for removing dangerous and harmful contaminations from the excavation area. The ways of installation of a fan are discussed, as well as characteristics of axial and centrifugal fans with presenting the undesirable phenomena during fan operation.