Measurement of Effective Degassing Radius of Advancing Hole for Gas Drainage
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摘要: 介绍了煤层超前钻孔的防突机理,比较和分析了超前瓦斯排放钻孔有效排放半径的3种测定方法,选择钻屑量与钻屑瓦斯解吸指标法进行了现场应用。应用结果表明,使用钻屑量与钻屑瓦斯解吸指标法测定排放钻孔的有效排放半径简便易行,准确可靠。Abstract: The paper introduced outburst preventing mechanism of advancing hole in coal seam,compared and analyzed three kinds of measurement methods of effective degassing radius of advancing hole for gas drainage,and selected method of drilling cuttings weight and gas desorption index of drilling cuttings for practice.The results of field application showed using the method of drilling cuttings weight and gas desorption index of drilling cuttings to measure effective degassing radius of advancing hole is simple and reliable.
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