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Probing into Times of Coal Cutting Revealing when Sampling in Porthole to Determine Methane Contents
Author(s): 
Pages: 39-40
Year: Issue:  3
Journal: SAFETY IN COAL MINES

Keyword:  煤钻屑含量测定孔口取样暴露时间;
Abstract: 通过对采用孔口取样方式进行瓦斯含量测定过程中煤钻屑暴露时间分阶段的分析与计算,从理论上得出了煤钻屑在钻孔中的暴露时间及装罐过程中煤样的平均暴露时间,为采用孔口取样方式进行瓦斯含量测定煤样暴露时间的计算打下了基础.
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