Abstract
The ventilation for underground coal mines and to the general underground mining work is indispensable. For pit coal mines in Quang Ninh is usually done by the main fans is located on the ground. Today, Nam Mau coal mines use three main fan stations operating in parallel to ventilate the mine. This fan has three stations of different capacities but is interconnected via the mine pits. Thus, during the operation occurred between three mutual “bracing” winds fan stations causing decreased fan performance and not satisfying my ventilation requirements. This paper analyzed, calculated, and determined each fan’s operating mode and reasonable fans when operating in parallel to improve fans’ performance and improve the efficiency ventilation for Nam Mau coal mine.
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