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到目前为止,始终认为给露天矿提供新鲜空气靠自然的空气流就足够了。同地下开采比较,通常都是这样。但在深露天矿中,由于使用了大量的靠内燃机作动力源的机动车辆,露天矿通风就可能成为一个重大课题。露天矿里的大气与通向井下的空气不同,通向井下的空气流在流动过程中其组成成分产生很大的变化、而露天矿里的大气组成成分趋向于较稳定的状态。只是当露天矿里的大气被有害气体和粉尘严重污染时,其组成成分才发生变化,氧含量轻微地减少,二氧化碳和有毒气体含量增加。
So far, it has always been considered sufficient to provide open-air mines with natural air flow of fresh air. This is usually the case when compared to underground mining. However, in the deep open pit mine, the open pit ventilation may become a major issue due to the large number of motor vehicles powered by internal combustion engines. The atmosphere in the open pit is different from the air leading to the downhole. The air flow to the downhole produces great changes in its composition while the atmospheric composition in the open pit tends to be more stable. Only when the atmosphere in the open pit is seriously polluted by harmful gases and dust, its composition changes only slightly, the oxygen content decreases slightly, and the content of carbon dioxide and toxic gas increases.