铀煤叠置矿区对煤矿开采环境氡影响的探讨

Abstract

Abstract: A large number of uranium-coal symbiosis deposits had occurred in the Inner-Mongolian area in China, and the uranium-coal superimposed areas were formed. In the process of uranium and coal mining and smelting, the radon produced by the decay of residual radionuclides in the uranium aquifer will seep and diffuse into the coal mining surface along with groundwater and underground pores in the mining area. In order to understand the radiation effect of radon on coal mining working surface, this phenomenon needs to be studied and analyzed. The CFD numerical simulation technology was used to simulate the radiation influence of the coal mining surface caused by the gas-liquid two-phase radon seepage and diffusion. The results show that the concentration of additional radon is between 263.22-645.54 Bq/m³ with the advance of coal mining. Measures such as strengthening ventilation and blocking measures should be taken to reduce the additional impact of radon concentration on coal mining operators.

Key words: uranium-coal superimposition, radon, gas-liquid two-phase

CLC Number:

TL75

JI Dong, LIU Ying, SU Xiaoshu, LI Yuangang, ZHOU Ju. Discussion on the influence of uranium-coal superimposed mining area on coal mine environment radon[J].RADIATION PROTECTION, 2021, 41(2): 138-144.

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Discussion on the influence of uranium-coal superimposed mining area on coal mine environment radon

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