Research and application of drilling process optimization for ground directional plugging of deeply buried water tunnels
GUO Binbin
HE Wen
WANG Xueqiang
KONG Weigang
XIE Fuxing
SHI Yujie
Abstract：To address the challenge of sudden water inflow in the deep-buried tunnels of the Western Trunk Line of the Central Shanxi Yellow River Diversion Project,a surface-directed plugging drilling technique was adopted.The study analyzed the adaptability of drill hole design,drilling equipment se-lection,and drilling construction processes.By optimizing the borehole trajectory and implementing a structural design featuring three-stage borehole diameters and two-stage casing,combined with com-posite drilling techniques and a combination of air drilling and mud drilling,precise trajectory control and efficient drilling were achieved.Field test results indicate that the ground-based directional plug-ging boreholes for the deep-buried water-bearing tunnel on the West Trunk Line achieved a cumulative drilling length of 1 929.94 meters with a 100％success rate.All boreholes precisely penetrated the predetermined tunnel locations,laying the foundation for subsequent aggregate filling and grouting plugging operations.These research findings provide valuable reference for ground-based directional plugging borehole drilling construction under similar conditions.
Keywords：deeply buried tunnelsdirectional drillingcomposite drillingwireless drilling inclination measurement
Publication Date：2025-12-31
Online Publishing Date：2025-11-25(First online date of this platform, not the publication date of the document)
Pages：5( 16-20 )