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一、前言随着采煤机械化的发展,生产高度集中化,产量大幅度提高,加之机械采煤易使煤岩粉碎,所以近几年来国外采煤工作面的产尘量有所增加。据各国不完全统计,矿井中70—85%的煤尘是由采煤机械产生的。煤尘不仅严重影响工人健康,而且是威胁矿井安全的一大隐患。如英国1970年因煤尘引起的火灾,占总明火火灾数的
I. Introduction With the development of mechanization of coal mining, production is highly centralized and output is greatly increased. Besides, coal mining is easy to be crushed by mechanical mining. Therefore, the amount of dust produced by foreign coal mining faces has increased in recent years. According to incomplete statistics from various countries, 70-85% of coal dust in coal mines is produced by coal mining machinery. Coal dust not only seriously affects workers’ health, but also threatens the safety of mines. Such as the United Kingdom in 1970 due to coal dust caused by the fire, the total number of open fires