钻孔随钻三维轨迹测量技术研究

Borehole trajectory 3-D survey while drilling

摘要:

煤矿井下钻孔施工中，在缺少控制钻孔轨迹偏移测量技术的情况下，施工钻孔轨迹与钻孔设计轨迹偏差较大，无法满足煤矿瓦斯抽采的设计需求。阐述了随钻钻孔三维轨迹测量技术，目的是通过对随钻三维轨迹测量技术的研究，精确控制瓦斯钻孔轨迹，解决瓦斯突出煤层快速掘进及安全高效回采问题。钻孔随钻三维轨迹测量技术是通过对钻机开孔角度和钻孔轨迹的精确测量，使用三维轨迹成图方法显示。通过大量的数据采集与施工验证证明，该方法成为预抽钻孔煤层保安全、促生产过程中的重要环节，避免了钻孔设计及施工的盲目性，提高了抽采钻孔的利用率及施工速度。

关键词:受控定向钻进;钻孔测斜仪;煤矿;底抽巷;钻孔轨迹;随钻三维轨迹测量

Abstract:

In underground drilling for drainage in coal mines, the deviation between the drilled borehole trajectory and the designed borehole trajectory is large due to absence of inclination measurement technology to control the drilling trajectory; thus it can not meet the design requirements of gas drainage in coal mines. This paper expounds the technology of three-dimensional trajectory measurement while drilling, aiming at precisely controlling the trajectory of gas drilling in bottom drainage roadways through the investigation of 3-D trajectory measurement technology while drilling, and achieving fast tunneling, and safe and efficient mining in gas outburst coal seams. The technology of 3-Dimensional trajectory measurement while drilling is to accurately measure the inclination of drilling holes and the trajectory of drilling holes, and present them with the 3-D trajectory mapping method. Through a large number of data acquisition and field verification, it has been proved that this method has become an important link in the process of coal seam safety and production, avoiding the blindness in borehole design and drilling, and improving borehole drainage coverage and drilling rates.

Key words:controlled directional drilling; borehole inclinometer; coal mine; bottom drainage roadway; borehole trajectory; borehole trajectory 3-D survey while drilling