Abstract
Inhaled radon status in the laneways of some Chinese stone-coal mines is a cause of concern. In this study, computational fluid dynamics simulations were employed to investigate three flowrates of the dilution gas (2.5, 5, and 7.5 m3/s) and radon distributions at realistic breathing levels (1.6, 1.75, and 1.9 m). The results showed that there are obvious jet-flow, backflow, and vortex zones near the heading face, and a circulation flow at the rear of the laneway. A high radon concentration area was found to be caused by the mining machinery. As the ventilation rate increased, the radon concentrations dropped significantly. An airflow of 7.5 m3/s showed the best dilution performance: The maximum radon concentration decreased to 541.62 Bq/m3, which is within the safe range recommended by the International Commission on Radiological Protection. Annual effective doses for the three air flowrates were 8.61, 5.50, and 4.12 mSv.
Subject
Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering
Reference37 articles.
1. Report of the United Nations Scientific Committee on the Effects of Atomic Radiation: Fifty-sixth Session (10–18 July 2008),2008
2. Radon Sources and Associated Risk in Terms of Exposure and Dose
3. WHO Handbook on Indoor Radon: A Public Health Perspective;Ting,2010
4. Cancer mortality patterns among US uranium miners and millers, 1950 through 1962;Joseph;J. Natl. Cancer Inst.,1964
5. The measurement of radon emanation rates in a Canadian cut-and-fill uranium mine;Cheng;CIM (Can. Inst. Min. Metall.) Bull,1981
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