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一、概况国外煤矿工业性的瓦斯抽放是1934年从日本开始的.随着开采的延深和加快,回采工作面的产量增高,矿井瓦斯涌出量也迅速增加,如英国有100多个工作面日产量达1000—3000吨,瓦斯涌出量可高达7O米~3/分;日本大多数矿井均为瓦斯矿井平均瓦斯量为30米~3/吨,在某些矿井高达70—100米~3/吨.由于用通风办法已不能完全将瓦斯控制在安全限度内,因此瓦斯抽放愈显必要.近年来,由于国外能源危机,为了把瓦斯作为一种自然能源加以利用.也加快了瓦斯抽放工作.因而,最近国外瓦斯抽放上作是发展很快的,1957年国外只有6个国家进行抽放 现已扩大到14个国家了;计有西德、英国、日本,法国、比利时、荷兰、加拿大、奥地利、美
I. Overview The industrial gas drainage in foreign coal mines started in Japan in 1934. With the deepening and speeding up of mining, the output of mining face increased and the gas emission from mines increased rapidly. For example, there are more than 100 Face daily output of 1000-3000 tons, gas emission can be as high as 7O m ~ 3 / min; Japan most of the mine gas wells are average gas volume of 30 m ~ 3 / t, in some mines up to 70-100 M ~ 3 / t. Due to the ventilation method can not completely control the gas within the safety limits, gas drainage is more necessary. In recent years, due to the foreign energy crisis, in order to use gas as a natural energy to speed up Therefore, the recent development of gas drainage in foreign countries is developing rapidly. In 1957, only 6 countries of foreign countries conducted drainage and now they have expanded to 14 countries. There are seven countries including West Germany, Britain, Japan, France Belgium, the Netherlands, Canada, Austria, the United States