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近年来,列宁诺哥尔斯克多金属联合企业在降低含尘量方面进行了大量的工作。如1959年至1969年间将井下坑道给风量由336米~3/秒增加到630米~3/秒,这样就大大地改善了采矿工的劳动卫生条件。从1958年到1967年期间采区放矿时的含尘量降低了76%。推广使用以通风管道集中污风并通过通风水平进行分段排除。为了降低耙矿水平的含尘量,采用延发爆破并将一次崩矿炸药消耗量提高到600一700克/吨,因而不合格的大
In recent years, a great deal of work has been done on reducing the amount of dust in the Leningrad-Gorsk polymetallic complex. For example, from 1959 to 1969, the volume of downhole tunnel air supply was increased from 336m3 / s to 630m3 / s, thus greatly improving the sanitary conditions of miners. From 1958 to 1967 during the mining area ore dust content decreased by 76%. Promote the use of ventilation pipes to concentrate the air pollution and segregate by ventilation level. In order to reduce the dust content of raking level, the use of extended blasting and the one to collapse ore explosives consumption increased to 600-700 g / ton, so unqualified large