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美国矿业局对控制长壁后退式开采工作面采煤机与下顺槽割边时产生的煤尘和瓦斯的多种方法进行了试验和鉴定。其中一些方法对控制煤尘和瓦斯都有效,而另外一些只对瓦斯或煤尘有效。本文介绍的几种方法是利用采空区风帘、人行道风帘、转载破碎机除尘装置和翼风帘来控制煤尘和瓦斯的。每种方法都能有效地改善工人的工作条件,降低设备费、安装费和维修费。
The U.S. Bureau of Mines has conducted tests and identified various methods for controlling coal dust and gas generated by coal mining machines cut along the longwall back-mining face and under the trough. Some of these methods are effective at controlling coal dust and gas, while others are only effective at gas or coal dust. This article describes several methods is the use of goafs air curtains, sidewalk air curtains, repower crusher dust removal device and wing to control the dust and gas. Each method can effectively improve the working conditions of workers, reduce equipment costs, installation costs and maintenance costs.