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根据中国与联邦德国签订的技术合作项目,煤炭部安全局组织考察小组,对联邦德国煤矿液氮灭火技术进行了考察。在此,将考察中收集的技术问题简介如下。 一、鲁尔煤炭工业概况 鲁尔煤炭公司下设三个矿业公司:下莱茵矿业公司,利伯矿业公司、维斯特法利亚矿业公司。三个矿业公司共有生产矿井23对,年产5800万吨商品煤,占全国产量(8500万吨)的70％。全员效率为4.16吨/工·班,井下效
According to the technical cooperation project signed between China and the Federal Republic of Germany, the Safety Department of the Ministry of Coal Mine organized a study group to examine the liquid nitrogen fire-extinguishing technology in the German Federal Coal Mine. Here, the technical problems collected during the survey are summarized as follows. First, the overview of the Ruhr Coal Industry Ruhr Coal Company consists of three mining companies: the Rhine Mining Company, Lieber Mining Company, Westphalia mining company. The three mining companies have a total of 23 pairs of mines, with an annual output of 58 million tons of commercial coal, accounting for 70% of the national output (85 million tons). Full efficiency of 4.16 tons / workers class, downhole effect