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以屯兰煤矿2#煤层和8#煤层为例,对其采用的多排大孔径钻孔抽采瓦斯技术进行研究,以SF6作为示踪气体对现场进行实验,测定不同抽采时间下的瓦斯抽采半径并研究该技术的可靠性和经济合理性。
Taking the coal seam # 2 and # 8 in Tunlan Coal Mine as an example, the gas drainage technology of multi-row large-bore drilling was studied. The experiment was carried out on the site using SF6 as the tracer gas, and the gas under different extraction time was measured Draw radius and study the reliability and economic rationality of the technology.