地浸采铀地下水本底值确定方法研究

Determination Method of Groundwater Baseline of In-situ Leaching of Uranium

地下水本底值是判定地浸采铀对地下水的影响程度和确定修复目标值的重要基准。地浸矿山水文地质条件复杂多样、监测数据参差不齐,目前地浸地下水本底值的确定缺少统一的方法和标准规范。因此,提出了确定地浸地下水本底值的工作程序,讨论了监测因子、取样范围、取样数量和密度、取样频次和取样深度等的确定原则,并以新疆和内蒙古2个地浸铀矿山的监测数据为基础,应用数理统计方法进行了论证。研究结果可为地浸采铀地下水本底值的确定提供指导。

The groundwater baseline is an important benchmark for determining the impact degree of in-situ leaching of uranium and determining the restoration target value.Due to the complex hydrogeological conditions and poor comparability of monitoring data,the determination of groundwater baseline still lacks a relatively contractual and unified technical method and standard specification.Therefore,the procedure of determining groundwater baseline is put forward,the monitoring factors,spatial scale,number and density of samples,sampling frequency and sampling depth are discussed and demonstrated by applying mathematical and statistical methods based on the monitoring data from two in-situ leaching of uranium projects in Xinjiang and Inner Mongolia.The research results can provide some guidance for determining groundwater baseline of in-situ leaching of uranium.