水平定向钻孔在大佛寺煤矿瓦斯抽采中的优势探讨

煤矿井下水平定向钻孔在煤矿瓦斯抽采中具有明显的技术优势。通过对大佛寺煤矿常规钻孔工作面瓦斯治理技术的分析,指出了其中不足;经过对定向长钻孔钻进工艺、布孔技术进行分析以及通过大佛寺煤矿现场应用,得出定向长钻孔有利于实现工作面瓦斯区域集中抽采的结论;瓦斯抽采统计数据分析对比证明定向长钻孔瓦斯抽采效率要明显优于常规钻孔。

Discussion of the Advantages of Horizontal Directional Borehole for Gas Drainage in Dafosi Coal Mine

Underground horizontal directional borehole in coal mine has more technalogieal advantages than the conventional bore hole in gas drainage. This paper analyzed the gas control technology of working face in conventional borehole of Dafosi coal mine with the disadvantages being pointed out. Based on the analysis on the drilling technology and borehole arrange- ment of long directional borehole and the field application, the conclusion is that the directional borehole is good for the centralized regional gas drainage in the working face. The data of the gas drainage proves that the gas drainage efficiency of the directional borehole is better than the conventional borehole.