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关于深凹露天矿大气被粉尘与瓦斯污染的问题,至今还是尖锐的。其原因是:作业的进一步集中与净化,以及自然通风作用随采深日益减弱,从而导致在工作面及露天矿全矿范围内的大气中,有害的悬空微尘与气态杂质浓度的增加。根据气象观测资料,目前,深凹露天矿自然通风不能满足需要的时期,平均占工作时间的10～12％。由于这种原因,采矿运输设备每年停产500小时。
The problem of atmospheric dust and gas pollution in the deep open pit mine is still sharp today. The reason for this is that further concentration and purification of operations and weakened natural ventilation with depth of extraction lead to an increase in the concentration of harmful suspended dust and gaseous impurities in the face and the atmosphere within the opencast mine. According to the meteorological observation data, at present, the natural ventilation in deep open-pit mine can not meet the needs of the period, accounting for an average of 10 to 12% of the working hours. For this reason, mining and transportation equipment is discontinued for 500 hours a year.