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通过分析正珠煤业1511综放工作面瓦斯来源并结合采空区冒落带、裂隙带高度,采用高、低双层位钻孔布置抽采,并进行了抽采效果分析。
Based on the analysis of gas sources in the coal face of No.1511 working face in Zhengzhu Coal Mine, combined with the height of the caving zone and fracture zone in goaf, high and low double-layer bit drilling layout was adopted for extraction and the extraction effect was analyzed.