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- Title
Damage of Uranium Tailings Dam and Radon Emission under Impact.
- Authors
LI Xiangyang; LI Neng; WANG Hong; CHEN Zhenxing; LIU Yong
- Abstract
Impact damage will destroy the structure of uranium tailings dam, and bring potential harm to the safety of people and property around and downstream. In this paper, the impact simulation experiment of uranium tailings dam is carried out through the self-developed horizontal impact test bench to study the damage characteristics of the dam and the radon emission law of the dam damage under the progressive loading of impact velocity. The experimental results show that the impact damage to the dam body is mainly manifested by the development of single main cracks on the surface and the penetration failure. The penetration depth increases with the increase of impact speed, and the change speed of the penetration depth after the penetration failure of the laterite layer increases. The cumulative growth rate of radon concentration before the penetration of laterite layer is faster than that after the penetration, and the law of penetration depth and overall radon exhalation rate presents a slow rise(OA) - rapid rise(AB) - stable trend(BC). The relationship between the penetration depth and the radon reduction coefficient shows a rule of rapid decline to a stable trend, and the variation of the radon reduction coefficient is only 2. 94% in the 3-7 cm penetration interval after the laterite layer penetration. The results can provide a reference for the study of safety and stability of uranium tailings dam.
- Subjects
TAILINGS dams; DAMS; RADON; SURFACE cracks; IMPACT testing; IMPACT loads; LATERITE; URANIUM
- Publication
Nonferrous Metals Engineering, 2023, Vol 13, Issue 6, p140
- ISSN
2095-1744
- Publication type
Article
- DOI
10.3969/j.issn.2095-1744.2023.06.019