摘要
为了解决在松软突出薄煤层中本层深孔施工难的问题,分析了在该条件下施工难点,采取了增大钻机能力和钻杆强度,增强外力排粉能力、钻杆自排粉能力和钻孔定位等技术措施进行施工,成功施工了256个孔深达到80 m以上的钻孔,百孔抽采瓦斯体积分数平均提高了3.6%,百孔瓦斯抽采量平均提高了162%,进尺量也有了显著提高。
In order to solve the problem of the deep borehole in-seam drilling in the soft and outburst thin seam, the paper analyzed the drilling technique diffieulty under such conditions. The paper proposed and took the technical measures of the drilling capacity increased, additional dust remove capaeity enhanced, drilling rod cutting remove capacity enhanced and drilling positioning for the drilling operation. 256 deep boreholes with a depth over 80 m were successfully drilled in total. The total drainage gas eontent from 100 boreholes was im- proved by 3.6% in average. The gas drainage production of 100 boreholes was improved by 162% in average. The drilling length was ob- viously improved.
出处
《煤炭科学技术》
CAS
北大核心
2009年第12期47-49,80,共4页
Coal Science and Technology
关键词
松软
突出
薄煤层
深孔
施工工艺
soft
outburst
thin seam
deep borehole
drilling technique
