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A process of extracting the coal mine gases co-existent with coal beds and rock deposits in a coal mine
A process of extracting the coal mine gases co-existent with coal beds and rock deposits in a coal mine
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机译:一种提取与煤矿中煤层和岩层共存的煤矿瓦斯的方法
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1,095,984. Minimising explosion risk in mines. TOA GOSEI KAGAKU KOGYO KABUSHIKI KAISHA. May 13; 1965 [May 18, 1964], No. 20148/65. Heading A5A. Explosive coal mine gases are extracted from unworked coal seams B' by inserting a casing pipe F into each vent hole E bored from a driftway A to seam B', filling at least a part of the annular space between F and E with an aqueous kneaded mixture of cement and one or more polymerisable polyvalent metal acrylates and/or methacrylates, with or without a polymerisation catalyst, the said mixture setting to form an annular seal G, and then extracting the gases through the pipe F and releasing them to the atmosphere or to storage means.
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