铀矿区地下水中氡迁移的室内模拟  

Laboratory simulation of radon transport in groundwater at uranium mine

作　　者：张莹[1] 张超宇[2] 彭玉芳[1] 张健[1] 

机构地区：[1]防灾科技学院,河北三河065201 [2]中国国土资源经济研究院,北京101149

出　　处：《中国矿业》2014年第6期145-149,共5页China Mining Magazine

基　　金：中国地震局教师科研基金资助(编号:20110103);防灾科技学院教学研究与教学改革项目资助(编号:201101)

摘　　要：为了查清某铀矿区氡在地下水环境中的迁移行为,分别开展示踪实验和氡迁移实验,室内模拟孔隙含水介质中氡的迁移过程,深入探讨地下水、土环境中氡迁移的内在规律性,揭示氡的环境行为特征。实验结果表明,氡在孔隙含水介质中运移以地下水对流作用为主,氡在横向上的运移不仅仅是扩散作用,还有地下水的载运作用、介质的吸附作用以及自身的衰变与挥发作用。氡的运移以水平迁移为主,已有研究成果中的"微气泡"理论并非氡在地下水中运移的主要机制。氡随时间变化规律进一步表明氡的迁移是氡的释放、累积与挥发、衰变、吸附作用及地下水对流作用等综合作用的结果。以上研究成果为定量化研究地下环境中氡的迁移归宿提供科学依据,为氡在铀矿勘查中的应用提供理论支持。In order to find out the migration behaviour of radon transport in groundwater environment at uranium mine ,transport process of radon in porous aquifer medium was simulated by laboratory experiment of radon transport and tracer experiment .This paper made in-depth discussions on the migration rules of radon in groundwater and soil and revealed the behaviours of radon in the environment .The experimental results indicated that convection dominated on the movement of radon in porous aquifer medium .The lateral migration of radon was due to not only diffusion but also carrying of groundwater , adsorption of porous medium ,decay and volatilization .The lateral migration played an important part in the movement of radon .The cluster theory and microbubble theory in the existing research results were not the principal migration mechanism of radon transport in porous aquifer medium .Release and accumulation , volatilization ,decay ,adsorption and convection should be the result of radon movement .The findings provided the scientific evidence for quantitative study of migration behaviours of radon in the underground environment and further support for the theory that the application of radon in uranium mine exploration .

关 键 词：氡 地下水 迁移 铀矿 

分 类 号：TD12[矿业工程—矿山地质测量]