反井施工技术在处理钻孔穿越坑道中的应用

Application of Reverse Reaming in Drilling through the Tunnel

摘要:

在危机矿山深部探矿钻探施工中，钻孔难免会遇到采掘或废弃的坑道，给钻孔的正常施工带来了诸多困难。遇此情况后，采用反井施工技术，对钻孔进行反拉扩孔实施套管隔离，会收到良好的效果。为此目的，设计了反拉扩孔钻具、解决了高泵压下循环介质的密封问题。实现了钻孔快捷、经济的一次穿越坑道，达到了地质设计的目的。

Abstract:

In the crisis mine deep exploration drilling, abandoned tunnels are inevitable encountered, which bring many difficulties for the normal construction. In this case, the use of reverse reaming technology and casing in the tunnel will receive good effect. The reverse reaming tools are designed to solve the sealing of circulation medium under high pump pressure; the geological designing purpose is realized with rapid and economic one-time crossing tunnel.