提高地浸钻孔出水量的有效技术措施

Effective technical measures to increase the water yield of leaching boreholes

摘要:

地浸钻孔是一种以采矿为目的的钻孔，提高钻孔出水量就是提高钻孔的采矿量。通过对多年地浸钻孔施工经验和理论进行分析，发现影响钻孔出水量的主要因素为钻井泥浆的成分和性能以及人工过滤层的渗透性差异，提出在地浸钻孔施工方案中采用植物胶净化泥浆钻进和扩孔、投砾罐射吸式填砾、物理化学组合洗井3种技术措施，对比前后施工钻孔的出水量大小，证明了该技术措施对提高地浸钻孔出水量具有良好的效果。

Abstract:

In-situ leaching drilling is a kind of drilling for the mining purpose, where increase in the borehole water yield means increase in the borehole mining volume. Analysis of in-situ leaching drilling experience over many years and its theory found the main factors influencing the borehole water yield were the composition and properties of drilling mud, and permeability difference of artificial filtering layers. Therefore, three technical measures are proposed for in situ leaching drilling: vegetable gel for purification in mud drilling and reaming, gravel filling by jet suction with the gravel tank, well flushing by physical and chemical combination. Comparison of the water yield results before and after the technical measures proved that the technical measures have good effect on increasing the in-situ leaching water yield.