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由底板抽瓦斯,从理论上讲有三种方法,即:1.由采区平行巷道或主要大巷向下钻眼;2.向上钻眼至上部巷道;3.在开采煤层底板开掘瓦斯平巷。后两种方法尽管多次试验成功,但在德意志联邦煤矿中却没有得到实际应用。下面阐述的只涉及第一种方法。一、发展简史1958年已开始在鲁尔区霍哥煤矿实行由煤层底板抽吸矿井瓦斯,随后爱华特诺尔斯特和其他邻近煤矿也采用了这种方法,爱华特煤矿十年来所打的2261个瓦斯
In theory, there are three ways to draw gas from the bottom plate, namely: 1. Borehole downhole from parallel roadway or main roadway in mining area; 2. Bore upward to upper alleyway; 3. Dig hole in coal seam floor for mining . The latter two methods have not been practically used in the federal coal mine in Germany, despite many successful trials. The following only deals with the first method. A Brief History of Development In 1958, Huo Coal Mine in Ruhr District started to draw mine gas through the floor of the coal seam, then Epworth and other nearby coal mines also adopted this method. In the past ten years, Epworth Coal Mine Hit 2261 gas