期刊论文

Study on the influence of water content and particle size fractal distribution on radon exhalation in overburden soil layer of uranium tailings pond

中文

安全与环境学报

1009-6094

2021

21

05

2209-2215

10.13637/j.issn.1009-6094.2020.1317

本校为第一机构

为了探究覆土层含水率和粒度分形分布对氡析出规律的影响,制备不同粒度分维值和含水率的覆土试样进行氡析出试验。根据氡产生的机理,设计一套氡测量装置并用局部静态法以测定相应覆土层表面的氡析出率。采用相关分析方法研究覆土层氡析出规律与含水率和分维值的关系,构建氡析出率与含水率和分维值之间的分段线性函数。结果表明:在相同含水率、不同粒度分形分布时,氡析出率随分维值增大而减小,并且当分维值增加到一定值时,氡析出率开始趋于稳定;在相同粒度分形分布、不同含水率时,氡析出率先是随着含水率增大而增大,但是当含水率增加到一定值时,氡析出率却开始减小。氡析出率会受到含水率和粒度分...

To explore the influence of water content and particle size fractal distribution of overburden soil on radon exhalation law,overburden soil samples with different particle size fractal dimensions and water contents were prepared for radon exhalation tests. According to the mechanism of radon generation,a set of radon measuring devices were designed and the radon exhalation rate of the corresponding overburden surface was measured by the local static method. The relationship between radon exhalation law and water content and fractal dimension of overburden was studied by correlation analysis,an...