期刊论文

Liu, Y.

中文

中国安全科学学报

1003-3033

2022

32

11

97-104

10.16265/j.cnki.issn1003-3033.2022.11.0284

11705083:国家自然科学基金 2019JJ50488:湖南省自然科学基金项目 80927015101:装备预研领域基金 202105006:衡阳市科技创新计划项目

本校为第一机构

为更有效地开展氡污染防治、氡示踪研究,根据分形理论与离散裂隙网络(DFN)建立裂隙介质氡迁移模型;采用双幂律模型描述裂隙位置与长度,多级联乘方法获得裂隙中心点位置,von Mises-Fisher分布函数确定裂隙方向,对数正态分布方法确定裂隙开度分布;采用自研试验装置验证理论模型,并使用理论模型分析某天然裂隙岩体氡迁移特征。结果表明:理论模型计算氡活度浓度与试验结果相差最大不超过4%,该裂隙岩体的平均氡析出率为0.002 58 Bq/(m~2·s),岩体内连通裂隙构成氡迁移的主要通道,裂隙密集处的最大氡通量比裂隙稀疏处的大约3个数量级。裂隙介质平均氡析出率随分形维数的增加而增大,随长度指数的增加而...

In order to effectively carry out radon pollution control and radon tracing research, the fractal theory and DFN were combined to establish a model of radon migration in fractured medium. In the model, the distribution of fracture lengths was obtained by a double-power law model. The location of fracture centers was determined by the multiplicative cascade process method. The von Mises-Fisher method and the lognormal distribution method were used to model fracture orientations and fracture apertures, respectively. The model was verified by usin...