Method and apparatus for reducing air leakage in a mine

摘要

#$%^&*AU2012204114A120130131.pdf#####ABSTRACT Abstract This invention relates to mine ventilation and a method and means of reducing air consumption by leakage across underground doors, such as man- and machine-doors. It comprises a door leaf having a sealing strip attached to extend beyond its periphery in the plane of the higher pressure side of the door leaf, for a sufficient distance to cover any gap between the leaf member and an adjoining jamb, when the door is in a doorway-closing position. The strip is of a material that is not only flexible under a pressure differential existing between the higher and lower pressure sides of the door, so as to be urged against the jamb in sealing engagement, but is also resilient to assume an orientation, when the door is opened, reducing the pressure differential in which it lies in substantially the same plane as defined by the higher pressure side of the leaf.CC ~QD I~ I f at -N C