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本文着重阐明长壁法开采时其沼气泄出量实际推算方法的发展。根据埃瑞的煤层瓦斯泄出理论的论述,这个方法可用计算机程序迅速而系统地推算出分布在地层经过采动后的各瓦斯源的泄出量。这些泄出量是从煤层内在瓦斯量、瓦斯来源层厚度及瓦斯泄出程度得来的,后一个函数来自于理论。与开采深度、开采层和瓦斯来源层的距离、采区已服务年限以及工作面推进速度有依赖关系。
This article focuses on the development of the actual estimation method of methane emissions when mining longwall method. According to Erie’s theory of gas outflow in coal seam, this method can quickly and systematically calculate the amount of outflow of each gas source distributed in the strata after mining by computer program. These quantities are derived from the amount of internal gas in the coal seam, the thickness of the gas source layer and the degree of gas leakage. The latter function is derived from the theory. It depends on the mining depth, the distance between the mining layer and the gas source layer, the service life of the mining area and the speed of working face advancement.