黑龙江嫩江县银多金属矿45°斜孔钻探施工技术

Drilling of a 45° inclined hole in Nenjiang Silver Polymetallic Mine, Heilongjiang Province

摘要:

在黑龙江省嫩江县二道坎村开展银多金属矿普查工作中使用MP-1000型便携式钻机进行了45°斜孔施工，该钻机占地小，搬迁方便，适合斜孔施工。针对斜孔施工中出现的钻孔漏失、坍塌掉块、钻孔偏斜的问题，通过采用改性刚性水泥堵漏剂对钻孔漏失段进行封堵，取得了良好的封堵效果；选用合适护壁性能的冲洗液减少了钻孔坍塌掉块；为防止孔斜，采用锚杆固定的方式稳固钻机，钻进过程中使用高胎体钻头，减少起下钻次数，避免掉块挤压钻具引起孔斜。通过选择合适的冲洗液以及不断优化施工工艺，45°斜孔施工取得了良好的效果。

Abstract:

An MP-1000 portable drill was used to drill a 45° inclined hole in Erdaokan village of Nenjiang County, Heilongjiang Province during survey of silver polymetallic mines. The drill occupies a small area and is easy to move, so it is suitable for inclined hole drilling. In view of drill hole leakage, collapse, falling stones, deviation in inclined hole drilling, the modified rigid cement plugging agent was used to plug the leakage section of the drill hole with good plugging effect achieved; the drilling fluid with proper wall protection performance has been selected to reduce the collapse and falling stones in the drill hole; and the anchor bolt has been adopted to fix the drill to prevent hole deviation. The high body drill bit was used to reduce the number of trips and avoid hole deviation due to squeezing drill tools by falling stones. By choosing the appropriate flushing fluid and optimizing the drilling technology, good results has been achieved in drilling of the 45° inclined hole.