Experimental research on radon migration in shrinkage mining stope under ventilation condition

doi:10.16265/j.cnki.issn1003-3033.2017.08.025

China Safety Science Journal ›› 2017, Vol. 27 ›› Issue (8): 144-149.doi: 10.16265/j.cnki.issn1003-3033.2017.08.025

• Safety Hygiene Engineering and Technology • Previous Articles Next Articles

Experimental research on radon migration in shrinkage mining stope under ventilation condition

YE Yongjun¹, SU Hang¹, DING Dexin², YU Xiuwu¹, ZHONG Yongming¹, LIANG Tao¹

1 School of Environment and Safety Engineering, University of South China, Hengyang Hunan 42100, China;
2 Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China,Hengyang Hunan 421001, China

Received:2017-04-27 Revised:2017-07-13 Online:2017-08-20 Published:2020-10-13

Abstract

Abstract: In order to study the law of radon exhalation from the blasted uranium ore heap in the stope of uranium mine, the shrinkage stope was chosen as the study subject and simulation experiments were carried out using a self-made experimental device of particle-packing emanation media. The uranium ore sample with a particle size of less than 6 mm was taken from an uranium mine in the south of China. Relationships between radon concentration, radon exhalation portion and ventilation mode, ventilation air volume were studied experimentally under the condition of changing the ore heap height from 20 cm to 40 cm. The results show that the exhaust radon concentration decreases with the increase of air volume, radon exhalation portion of the heap increases with the increase of ventilation air volume, that under the same ventilation air volume and ventilation mode, the exhaust radon concentration and radon exhalation portion of descentional ventilation is lower than that of ascentional ventilation, that when the ventilation air volume and airflow direction are the same, exhaust radon concentration and radon exhalation portion of ore heap in central ventilation stope is lower than that of end ventilation stope, and that radon concentration increment per unit length of the workspace in central ventilation is greater than that in end ventilation when the air volume is the same.

Key words: particle-packing emanation media, ventilation mode, radon concentration, radon exhalation portion, shrinkage stope

CLC Number:

X962

YE Yongjun, SU Hang, DING Dexin, YU Xiuwu, ZHONG Yongming, LIANG Tao. Experimental research on radon migration in shrinkage mining stope under ventilation condition[J]. China Safety Science Journal, 2017, 27(8): 144-149.

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Experimental research on radon migration in shrinkage mining stope under ventilation condition

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