由于井下采用现代化大功率采掘机械化技术,一方面提高了劳动生产率,另一方面由此而产生大量细微粉尘,它们对矿工的身体危害最大。尽管井下采取了综合降尘措施,但矿井空气残留的含尘量远远超过所允许的浓度,这样就增加了矿工尘肺病和粉尘性支气管炎的发病率。防止矿工呼吸有害的煤尘和岩尘,采用防尘面罩 Due to the underground mining using modern high-power mining mechanization technology, on the one hand to improve labor productivity, on the other hand, resulting in a large number of fine dust, they are the most harmful to the miner’s health. In spite of the comprehensive dust control measures taken downhole, the residual dust content in mine air far exceeds the allowable concentration, thus increasing the incidence of miners’ pneumoconiosis and dust bronchitis. Prevent miners breathing harmful dust and dust, the use of dust masks