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五、矿井通风在使用连续采煤机房柱式开采时,美国矿井通风系统、风最计算及有关规定和我国的矿井通风有许多不同之处,这主要是他们从本国煤层赋存特点及长期生产经验而考虑的。1.通风有关规定通风的有关规定是美国联邦政府煤矿保健及安全法规程所要求。(1)所有工作面含氧量不小于19.5%,二氧化碳不大于0.5%,沼气浓度总风流中不能超过2%,工作面不超过1%。(2)任何进行掘进、回采、装载的平巷内,平均风速要维持在18米/分(60英尺/
V. Ventilation of mines There are many differences between the calculation of the ventilation system and the wind in the United States and the ventilation of mines in our country when using the continuous mining machine with column-type mining. This is mainly due to their occurrence characteristics and long-term production from the coal seams in China Experience and consideration. 1. Ventilation The relevant provisions of the relevant provisions of the ventilation is the United States federal government coal mine health and safety law requirements. (1) The oxygen content of all working surfaces shall not be less than 19.5%, carbon dioxide not larger than 0.5%, biogas concentration shall not exceed 2% of the total air flow and the working surface shall not exceed 1%. (2) The average wind speed in any roadway under heading, mining and loading shall be maintained at 18m / min (60ft /