【摘要】 在地浸采铀过程中,需要尽量减少溶浸液向采区外围流失,并控制采区外围天然地下水向采区的流入量,以提高浸铀效率和减轻对周围地下水环境的影响。以某地浸采铀单元为例,通过设置不同的抽注流量组合进行地浸水动力数值模拟计算,研究地浸抽注平衡关系对溶浸液的流失及地下水流入的影响规律。结果表明,地浸采铀过程抽注流量的平衡关系是影响溶浸液流失量和外围地下水流入量的重要因素,溶浸液流失量随抽注流量比值的增大而减少,外围地下水的流入量则随抽注流量比增大而增加。当抽注流量比≥0.87时,溶浸液流失量可控制在注液流量的15%以下,而抽注流量比≤1.13时,外围地下水流入量不超过抽液流量的14%。模拟结果为合理控制地浸采铀过程中的溶浸液和地下水交换量提供借鉴。更多还原

【Abstract】 During the process of in-situ leaching of uranium,for mining efficiency and environment concerns,efforts should be made to minimize the outflow of leaching solution from mining site and the inflow of nature groundwater from surrounding.Based on a series of simulations of in-situ leaching process in cases of different leaching injection and pumping arranges,it is focused on how those outflow and inflow are influenced by the changes of leaching injection and pumping via mining wells.The results show that the change of pumping-injection equilibrium is the principle cause of leaching solution’s outflow and groundwater’s inflow.As the ratio of pumping flux to injection flux increases,the leaching solution’s outflow decreases;on the contrary,groundwater’s inflow increases.When the ratio of pumping flux to injection flux is no less than 0.87,the ratio of leaching solution’s outflow to injection flux can be controlled below 15%.When the ratio of pumping flux to injection flux is no more than 1.13,the ratio of groundwater’s inflow does not exceed 14%.The result has great significance to control the exchange between leaching solution and groundwater during the in-situ leaching of uranium process.更多还原