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在地下巷道掘进中,风动凿岩机功率的提高及其使用范围的扩大,导致稀油耗量的大幅度增加。这样就加剧了油雾对掘进工作面大气的污染(油雾的极限允许浓度为5
In the tunneling of underground tunnels, the increase of the power of the rock-drilling rock drill and the expansion of its scope of use lead to a substantial increase of the consumption of thin oil. This exacerbated the oil mist on the heading face of the air pollution (oil mist limits allowable concentration of 5