Research on radon control performance of covering soil in uranium tailings reservoir under long time high temperature

中国安全科学学报 Pub Date : 2020-03-28 DOI:10.16265/J.CNKI.ISSN1003-3033.2020.03.026

Liu Yan, Liu Yong, Xu Zhenghua, Hong ChangshouZHANG Qiucai, Yuan Jinfan

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引用次数: 1

Abstract

In order to study variation characteristics of radon control performance of unsaturated covering soil on uranium tailings beach under long time high temperatureꎬ with uranium tailings pond as study subjectꎬ simulation experiments were carried out by using a self ̄made experimental device of radon exhalation from covering soil on the beach. Thenꎬ relationships between water contentꎬ degree of surface fissure development and radon exhalation rate of covering soil were studied with samples of tailing sand at a depth of 1􀆰 5 m from a uranium tailings pond in south China. The results show that the change of radon exhalation rate is divided into four stagesꎬ linear growthꎬ linear declineꎬ " step" growth and tending to 中国安全科学学报 China Safety Science Journal 第30卷 2020年 stability. It increases with the increase of fracture rate of covering soilꎬ and tend to be steady when shrinkage limit is reached and crack no longer develops. Moreoverꎬ the greater fractal dimension of cracks isꎬ the more obvious soil cracking isꎬ and the greater radon exhalation rate will be.

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长时间高温条件下铀尾矿库覆盖土控氡性能研究

为研究长时间高温下铀尾矿库滩非饱和覆盖土防氡性能的变化特征ꎬ以铀尾矿库为研究对象ꎬ，利用自制的铀尾矿库滩覆盖土氡释放实验装置进行了模拟实验。然后利用南方某铀矿尾矿库1􀆰5 m深度尾砂样品，研究了ꎬ含水率ꎬ地表裂隙发育程度与覆盖土氡呼出率之间的关系。结果表明，氡呼出率的变化分为4个阶段ꎬ线性增长ꎬ线性下降ꎬ“阶跃式”增长并趋于稳定。随着覆盖土断裂率的增加ꎬ增大，达到收缩极限后趋于稳定，不再发生裂缝。且ꎬ裂缝分形维数越大ꎬ，土体开裂越明显ꎬ，氡呼出率越大。

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来源期刊

中国安全科学学报

CiteScore

1.30

自引率

0.00%

发文量

8733

期刊介绍： China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad. China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454. Honors: Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level National Chinese core journals China Science and technology core journals CSCD journals The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included