中文摘要：

铀尾矿库和地表浸铀铀矿堆是一种颗粒堆积型射气介质,其水位的变化和覆水厚度对氡迁移与析出的影响不容忽视。为揭示这类介质表面氡析出的规律,本文基于菲克定律和气液两相界面氡的传输理论,建立了水浸颗粒堆积型射气介质氡的一维传输-扩散数学模型,并获得稳态条件下气液两相体系中氡浓度分布的解析解和氡析出率的计算公式。通过研究,获得以下结论：1）水位为0m时,颗粒堆积型射气介质表面氡析出率随介质厚度的增大而增大,其增长率随厚度的增大而减小;2）介质表面氡析出率随水位的增大先增大后减小;3）当水体高度大于射气介质厚度时,覆水表面氡析出率随覆水厚度的增大而减小,随覆水氡扩散系数的增大而增大。

英文摘要：

Uranium tailings and surface heap leaching of uranium ore are particle-packing emanation media,and the effect of the inner water level and the thickness of the overlying water on the migration and emanation of radon can not be ignored.In order to reveal the law of radon emanation on the surface of the media,according to the Fick＇s law and the radon transfer theory in air-water interface,one-dimensional diffusion-transfer mathematical model of radon in the water-immersing particle-packing emanation media was established,and the analytical solution of radon concentration in the air-water two-phase system under the steady state conditions and the radon exhalation rate calculation formula were obtained.When the water level is 0m,the surface radon exhalation rate of particle-packing emanation media increases with the thickness of particle-packing emanation media,and the growth rate decreases with the increase of the thickness.The surface radon exhalation rate first increases with the water thickness and then decreases.When the height of water is greater than the thickness of emanation media,the surface radon exhalation rate decreases with the increase of the thickness of the overlying water,and increases with the increase of the radon diffusion coefficient.