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1986年,美国已有108个长壁采煤工作面,影响这些工作面发挥生产潜力的主要因素是有效地控制粉尘问题。因此,美国内政部矿业局与长壁开采行业合作,对各种主要降尘和辅助降尘技术进行了鉴定和评价。其结果表明,综合使用这些降尘技术可以确保长壁开采过程中产生的煤尘符合联邦的健康标准。这些主要的有效的技术包括1、由几个装在采煤机上顺风放置喷雾器和一个或几个
In 1986, there were already 108 longwall coalfaces in the United States. The main factor influencing the production potential of these facets was the effective control of the dust problem. Therefore, the United States Department of Interior Mining Bureau and the longwall mining industry cooperation, all kinds of major dust and auxiliary dust technology were identified and evaluated. The results show that the combined use of these dust removal technologies ensures that coal dust produced during longwall mining conforms to federal health standards. These major and effective technologies include 1, by several mounted on the shearer downwind sprayer and one or several