In situ leaching (ISL) uranium mining technology is an in situ mining technology in which the chemical solution is injected into the ore-bearing strata through drilling wells, and the solution moves along the ore bed by controlling the hydraulic gradient of the flow field and reacts with the ore to form uranium-bearing solution. To reduce leaching dead angle in the process of leaching, each pumping and injection unit should achieve uniform leaching at the end of production, and appropriate pumping and injection mode should be adopted for pumping and injection wells of each unit in the mining area. In this paper, on the basis of the actual production data of a sandstone uranium mine, we established the unit flow model of ISL uranium mining area by using GMS software. The unit flow balance of 72 boreholes in the whole mining area was analyzed and optimized through the model. The concept of flow microbalance of pumping and injection unit in the mining area is put forward for the first time, and the calculation equation of supply and receive the flow of pumping and injection well is determined. The calculation and analysis process of flow microbalance of pumping and injection unit in mining area is established. The simulation results showed that the application effect of the model was good, and the correlation coefficient of the solute transport model reached 0.8.

中文翻译：

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原位浸出铀矿区抽注装置流动微量平衡模拟

原位浸出（ISL）铀矿开采技术是通过钻井将化学溶液注入含矿地层，通过控制流场的水力梯度和使溶液沿矿床移动的一种原地开采技术。与矿石反应形成含铀溶液。为减少浸出过程中的浸出死角，各抽注单元在生产结束时应做到均匀浸出，采区各单元抽注井应采用适当的抽注方式。本文以某砂岩铀矿实际生产数据为基础，利用GMS软件建​​立了ISL铀矿区单位流模型。通过模型对整个矿区72个钻孔的单位流量平衡进行了分析和优化。首次提出矿区抽注装置流量微量平衡的概念，确定了抽注井供受流量的计算方程。建立了矿区抽注装置流量微量平衡计算分析流程。仿真结果表明，该模型应用效果良好，溶质运移模型相关系数达到0.8。建立了矿区抽注装置流量微量平衡计算分析流程。仿真结果表明，该模型应用效果良好，溶质运移模型相关系数达到0.8。建立了矿区抽注装置流量微量平衡计算分析流程。仿真结果表明，该模型应用效果良好，溶质运移模型相关系数达到0.8。