2D电法监测地浸采铀溶浸剂运移过程探讨  

Discussion on Monitoring the Migration Process of Leaching Agent in Uranium In-situ Leaching Using 2D Electrical Resistivity Method

作　　者：许昶锐 汤文武 罗跃 周意如 XU Changrui;TANG Wenwu;LUO Yue;ZHOU Yiru(School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China;School of Geophysics and Measurement-Control Technology,East China University of Technology,Nanchang 330013,China;Inner Mongolia Mining Co.,Ltd.,CNNC,Hohhot 010010,China)

机构地区：[1]东华理工大学水资源与环境工程学院,南昌330013 [2]东华理工大学地球物理与测控技术学院,南昌330013 [3]中核内蒙古矿业有限公司,呼和浩特010010

出　　处：《有色金属（冶炼部分）》2025年第1期99-109,共11页Nonferrous Metals（Extractive Metallurgy)

基　　金：江西省自然科学基金资助项目(20224BAB203038);国家自然科学基金资助项目(42372295)。

摘　　要：为提高砂岩型铀矿地浸开采效率,需要掌握注入含矿层的溶浸剂溶浸范围,但目前铀矿山还没有高效的观测手段。酸法溶浸剂的主要组分是硫酸,其浓度高达15 g/L,会显著改变含矿层中地下水电阻率。电法勘探对地下介质电阻率变化反应灵敏,为溶浸剂运移观测提供了可能。以我国内蒙古某酸法地浸铀矿为背景,通过数值算例,探讨双偶极、温纳、施伦贝尔三种高密度电阻率装置探测因硫酸运移产生电性异常区域,并通过电性异常区域反向圈定硫酸的溶浸区域。结果表明,三种装置均能够观测到100 m深度因溶浸剂运移产生电性变化区域的视电阻率响应,其中双偶极装置的观测效果和圈定效果最好,其反演结果能够较好地划分电性异常区域的左右边界,60 d后的反演低电阻异常区域面积与对应时刻溶浸区域面积较为吻合。井测线观测装置对地下电阻率变化的灵敏度要高于纯地表测线观测方式,但成本也更高。To improve the efficiency of in-situ leaching uranium mining in sandstone-type deposits,it is crucial to understand the leaching agent's migration range within the ore-bearing layer.Currently,uranium mines lack efficient observation methods for this purpose.The primary component of acid leaching agents is sulfuric acid,with a concentration as high as 15 g/L,which will significantly alter the groundwater resistivity within the ore-bearing layer.Electrical prospecting,which is sensitive to changes in underground resistivity,offers a potential method for observing leaching agent migration.Taking an acid leaching uranium ore in Inner Mongolia as a case study,three kinds of high density resistivity devices,namely dipole-dipole,Wenner and Schlumberger,were discussed to detect the electrical abnormal region caused by sulfuric acid migration and to delineate the leaching region of sulfuric acid in reverse through the electrical abnormal region.Numerical simulations demonstrate that all three configurations can detect apparent resistivity responses at depths of 100 meters due to leaching agent migration.Among them,the dipole-dipole configuration performs best in terms of observation and delineation,its inversion results can accurately define the boundaries of the electrical anomaly regions.After 60 days,the inversion low-resistivity anomaly area closely matches the leaching area at the corresponding time.The sensitivity of well line observation devices to changes in underground resistivity is higher than that of pure surface line observation methods,but the cost is also higher.

关 键 词：数值模拟 地浸采铀 溶浸剂运移 电法勘探 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]