黔西南水银洞金矿涌水坑道钻探难点与对策

Challenges and countermeasures for water kicks in tunnel drilling at Shuiyindong Gold Mine in Southwest Guizhou

摘要:

针对黔西南水银洞金矿坑道钻探施工中的特大涌水钻孔，总结了该矿区坑道钻探施工难点，研究了涌水对钻进效率和岩心采取率的影响，探讨了普通取心工艺钻进时采用岩心上升系数的实践意义，提出绳索取心工艺钻进时的“泄”、“堵”、“疏”的解决思路，形成了解决该矿区Ⅰa含矿层的坑道钻探施工难点的对策，以期为类似地层条件的坑道钻探提供技术指导。

Abstract:

In view of the extra-large water kick volume in tunnel drilling at Shuiyindong Gold Mine in Southwest Guizhou, this paper summarizes the challenges in tunnel drilling, and examines the effect of super-large water kicks on drilling efficiency. In order to overcome these challenges, the practical significance of using the core-lifting coefficient in conventional core drilling is discussed and the countermeasures of “draining”, “blocking”, and “dredging” in wire-line core drilling are put forward, forming the tunnel drilling technology suitable for the Ⅰa ore seam of the mine. It may provide technical support for other tunnel drilling in similar formation conditions.