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在矿井开拓和采准工作中,当两个工作面同时掘进,其间距离较短时,常用两台局部扇风机分别抽出各作业面的废风,再经三通汇集到总回风筒再排至回风天井或地表.通常,汇集处的三通采用手动闸门控制,但手动闸门需要人员管理,有时因操作失误或疏忽,还可能造成某段风路中风筒风压过
In mine development and quasi-approval work, when two working faces are driven at the same time and the distance between them is short, two local fan fans are respectively used to extract the waste air of each working face separately, and then are collected to the total return air duct rearrangement To the return air patio or the surface.Usually, the collection office of the three control by manual gate, but the manual gate needs personnel management, sometimes due to operational errors or negligence, may also cause some air duct stroke pressure