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| Research on Radon Concentration and Radioactivity Level of Part Coal Mine in Guizhou Province |
| LI Zhou, YANG Zhong, WEI Tao, et al |
| Guizhou province Center for Disease Prevention and Control, Gui yang 550004 China |
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Abstract Objective To research and assess radon concentration and radioactivity level of part coal mine in Guizhou province.Methods To measur the radon concentration in well, analyze the content of nature radionuclide, measure γ radiation levels, survey 13 underground coal mine in 4 county of Guizhou province.Results In this survey, radon concentration between 31.7 and 351.7 Bq/m3;content of nature radionuclide in coal, 226Ra is between 14.1 and 1 573.5 Bq/kg, 232Th is between 13.8 and 40.2 Bq/kg, 40K is between less than LLD (lower limit of detection) and 497.2 Bg/kg, γ radiation levels is between 4 and 48(×10-8Gy/h).Conclusion By using mechanical ventilation facility, there is good ventilated rate in the well of coal mine, therefore the radon concentration is lower using[1, 2].Coal with high radioactivity level and residue will be harmful to environment of storing site, affective the reuse of residue.
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Received: 03 October 2006
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