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The original ventilation resistance of zgm coal mill

2011 Underground Coal Operators’ Conference The AusIMM Illawarra Branch 10 – 11 February 2011 225 THE EFFICIENCY STUDY OF THE PUSHPULL VENTILATION SYSTEM IN UNDERGROUND MINE Xichen Zhang1Yutao Zhang and Jerry C Tien ABSTRACT Auxiliary ventilation refers to the systems that are used to supply fresh air to the working faces in dead end including the use of a push

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