“数字建井”在砂岩型铀矿地浸开发中的探索与应用

Exploration and application of“digital well construction”in in-situ leaching of sandstone uranium deposit

随着我国地浸采铀技术的进步,国内天然铀生产格局逐步由南方硬岩转向北方砂岩。对于资源禀赋条件好的砂岩型铀矿,地浸采铀资源回收率可达80%~90%,经济性显著;但赋存条件复杂的砂岩型铀矿,浸采率低、回收周期长、成本高等问题依然突出。为提升复杂砂岩型铀矿浸出技术,在数字时代和铀矿冶发展新模式驱动下,“数字建井”技术理念被提出。本文介绍了地浸采铀“数字建井”技术的内涵、主要做法及实施流程、在内蒙古某铀矿开展的初步探索和取得的应用效果,以及应用过程中尚存在的技术难点问题,最后对“数字建井”技术未来发展趋势进行了分析和展望。研究结果表明,基于大量地质信息及三维精细化模拟的“数字建井”技术能够实现多井统筹和过滤器建造优化,与传统地浸采铀的“即时”成井和单井建造过滤器模式相比,地浸采铀“数字建井”技术有助于提高资源利用率。

With the progress of in-situ leaching uranium mining technology in China,the pattern of natural uranium production in China has gradually changed from hard rock in the south to sandstone in the north.At present,for which sandstone uranium deposit with good conditions,the resource recovery rate of in-situ leaching uranium can reach 80%-90%,and their economy is significant.However,for which uranium deposits with complex occurrence conditions,the problems of low leaching rate,long recovery cycle and high cost are still prominent.Driven by the digital era and the new development mode of uranium mining and metallurgy,in order to improve the leaching technology of complex sandstone uranium deposits,the technical concept of“digital well construction”is put forward.This paper introduces the connotation,main methods and implementation process of“digital well construction”technology for in-situ leaching uranium,and introduces the initial exploration and application results in a uranium mine in Inner Mongolia.At the same time,it also introduces the technical difficulties in the application process.Finally,it analyses and prospects the future development trend of“digital well construction”technology.The initial research shows that“digital well construction”technology which based on a large amount of geological information and three-dimensional fine simulation can achieve multi-well planning and filter construction optimization.Compared with the traditional“real-time”well completion and single well filter construction mode,the“digital well construction”technology helps to improve resource utilization in in-situ leaching of sandstone uranium deposits.