某地浸采铀矿山采区井场地下水中铀迁移预测

Predicting the migration of uranium in groundwater of a in-situ leaching uranium mine

通过对某地浸采铀矿山井场水文地质条件的分析,建立该区地下水污染物迁移的二维水流、水质耦合迁移的数学模型。采用Visual MODflow软件模拟铀浓度分布。10、20、40 a后地下水中铀最高质量浓度中心分别迁移至距井场中心约93、1403、02 m处;而最高质量浓度在10 a后,基本不变;20、40 a后由20.0 mg/L分别降至16.0、12.0 mg/L。利用监测结果对模型进行检验,检验结果表明模型比较合理。

Based on the hydrogeological condition in the wellfield of a in-situ leaching uranium mine, the two dimensional mathematic model of contaminant transportation was established, and the soft- ware Visual MODflow was applied to calculate the distribution of uranium concentration in the groundwater. The results show that after 10 years, 20 years and 40 years, the center of the extent of the maximum uranium concentration is about 93 m, 140 m and 302 m respectively apart from the center of the wellfield years and 12.0 mg The calibration by , and the maximum uranium concentration will be reduced to 16.0 mg/L after 20 /L after 40 years from original 20.0mg/L, but it has hardly change after 10 year. the monitored value shows that the model is reasonable.