煤巷超前钻孔防突技术的研究

Study on the Technology of Advancing Hole for Outburst Prevention

通过研究超前瓦斯排放钻孔的有效排放半径,为煤层超前钻孔的布置提供科学依据,提高防突措施的有效性。以平煤十三矿为研究应用基地,以超前钻孔的防突机理为指导,对使用瓦斯压力降低法、钻孔瓦斯流量法以及钻屑量与钻屑瓦斯解吸指标法测定超前瓦斯排放钻孔有效排放半径的过程进行了比较和综述;合理选择了钻屑量与钻屑瓦斯解吸指标法进行现场应用。通过研究分析,掌握了超前瓦斯排放钻孔有效排放半径各种测定方法的选择与应用,实现了煤层超前钻孔科学布置防突的有效性。

Through the research of effective degassing radius of advancing hole for coal seam, for its arrangement to provide a scientific basis, and improve the effectiveness of outburst prevention measures. Research and applications are based to No. 13 coal mine Of Pingmei group, protection against outburst mechanism as a guide,and use the method of decreasing gas＇s pressure and the method of drilling gas flow or the method of drilhng cuttings weight and gas desorption to compare and summarize the process of measuring of effective degassing radius of advancing hole for coal seam. Through research and analysis, we can master the choice and application of effective degassing radius of advancing hote for coal seam,it emphasizes the validity of protection against outburst.