A two-dimensional model for the analysis of radon migration in fractured porous media

被引：5

作者：

Wu, Yurong ^{[1
]}

Chen, Xiaojie ^{[1
]}

Kang, Qian ^{[1
]}

Lan, Ming ^{[1
]}

Liu, Yong ^{[2
]}

Feng, Shengyang ^{[1
]}

机构：

[1] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China

[2] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2023年 / 30卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Fractured porous media; Radon migration; Fractal discrete fracture network; Finite element method; LENGTH; FLOW;

D O I：

10.1007/s11356-023-25491-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper develops a new two-dimensional model to estimate the radon exhalation rate of fractured porous media. The fractal discrete fracture network is used to characterize the fracture structure in the model. The finite element method solves the governing equations of radon migrations in fractures and porous matrix. Well-equipped laboratory tests validate the model with reasonable accuracy. The comparison of the model with the traditional radon migration model indicates that the model can simulate radon migration in fractured porous media more effectively than the traditional model. The effects of fracture intensity (P-21), seepage velocity, and fracture connectivity on radon migration in fractured porous media are analyzed using the model. The radon exhalation rate increases with the fracture intensity and seepage velocity. There is an exponential relationship between fracture connectivity and radon concentration. The model provides a reliable method to analyze radon migration in fractured porous media and is helpful for radon pollution prevention and control.

引用

页码：45966 / 45976

页数：11

共 23 条

[1] A discrete model for prediction of radon flux from fractured rocks [J].

Ajayi, K. M. ;

Shahbazi, K. ;

Tukkaraja, P. ;

Katzenstein, K. .

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING, 2018, 10 (05) :879-892

[2]

Alghalandis YF, 2011, P 2011 AUSTR GEOTH E, P15

[3]

Angell WJ., 2009, WHO handbook on indoor radon: a public health perspective

[4] Hydraulic properties of fractured rock masses with correlated fracture length and aperture [J].

Baghbanan, Alireza ;

Jing, Lanru .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2007, 44 (05) :704-719

[5]

Barenblatt G. I., 1960, J Appl Math, V24, P1286, DOI 10.1016/0021-8928(60)90107-6

[6] Connectivity of random fault networks following a power law fault length distribution [J].

Bour, O ;

Davy, P .

WATER RESOURCES RESEARCH, 1997, 33 (07) :1567-1583

[7] SOME CONSEQUENCES OF A PROPOSED FRACTAL NATURE OF CONTINENTAL FAULTING [J].

DAVY, P ;

SORNETTE, A ;

SORNETTE, D .

NATURE, 1990, 348 (6296) :56-58

[8] Fractal discrete fracture network model for the analysis of radon migration in fractured media [J].

Feng, Shengyang ;

Wang, Hanqing ;

Cui, Yu ;

Ye, Yongjun ;

Liu, Yong ;

Li, Xiangyang ;

Wang, Hong ;

Yang, Rong .

COMPUTERS AND GEOTECHNICS, 2020, 128

[9] A fractal analysis of radon migration in discrete fracture network model [J].

Feng, Shengyang ;

Wu, Yurong ;

Liu, Yong ;

Li, Xiangyang ;

Wang, Xiaodong ;

Chen, Puxin .

CHEMOSPHERE, 2021, 266

[10] An experimental method for measuring the radon-222 emanation factor in rocks [J].

Ferry, C ;

Richon, P ;

Beneito, A ;

Cabrera, J ;

Sabroux, JC .

RADIATION MEASUREMENTS, 2002, 35 (06) :579-583

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