Abstract
Coal seam methane content (Mn) is defined as the volume of natural methane contained in the unit of weight. This parameter is one of the most important parameters determining the gas and coal outburst in all coal basins of the world [3]. Review of methods for assessing methane deposits in the Polish coal mining industry and the world can be found in [4]. Borehole method is method used for accurate determinations of the coal seam methane direct in Polish coal mines. To determine the amount of methane using a sample of cuttings taken from a borehole in the forehead of the excavation to the air-tight container. Volume of methane desorbed during drilling and sampling. The gas obtained in the degasification process is analyzed in gas chromatography, which allows to determine the share of hydrocarbons in the all gas included in the coal. In this way, a volume of methane contained in the container is measured.
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