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煤与瓦斯突出矿井多松软煤层,若存在严重的喷孔现象,则会使钻孔施工过程困难重重,制约了突出矿井的瓦斯防治力度.为解决该问题,本文从软煤钻孔护壁工艺和工况参数着手,研究出一套适合严重喷孔松软煤层的钻孔施工装备,并进行了现场试验.试验证明,该套装备能有效防止钻杆对钻孔壁扰动,配以风力排渣压注式封孔和拖动式下套技术,能有效增加松软喷孔煤层措施孔的长度.最后,通过理论和实际应用方面的总结分析可知,该套装备能普遍适应湖南煤与瓦斯突出矿井煤层钻孔施工条件、提高钻孔钻进深度,是目前一套最佳选择的装备.
If coal and gas outburst more soft coal seam, if there is a serious spray hole phenomenon, it will make the drilling process difficult, restricting the outburst mine gas prevention and control efforts.To solve this problem, this paper from the soft coal drilling wall technology and Working conditions parameters to study a set of serious holes for soft coal seam drilling equipment and conducted field tests.The test proved that the set of equipment can effectively prevent the drill pipe wall borehole disturbance, together with the wind slagging pressure Note sealing and dragging the next set of technology can effectively increase the length of the loose hole coal injection hole measures.Finally, through the theoretical and practical application of the summary analysis shows that the set of equipment can be generally adapted to Hunan coal and gas outburst coal seam Drilling conditions, improve drilling depth, is the best set of equipment.