Abstract:
The natural radiation dose received by workers in underground mines mainly comes from radon and its daughters. In order to reduce the radiation hazards to workers, it is necessary to estimate and control the radon-induced dose in each branch of the underground mine. Therefore, based on the ventilation network theory, nuclide decay theory, particle settlement theory, and dose estimation model, these models for estimating radon activity concentration, radon daughter alpha potential concentration, and radon-induced dose in each branch of the mine ventilation network was proposed. Subsequently, based on two radon-induced dose estimation models, a control method for radon induced-dose in the ventilation network was proposed. Finally, a specialized code was written using the MATLAB software to calculate and analyze specific examples. The results show that the two proposed estimation models for radon-induced dose in the mine ventilation network consider the radon equilibrium factor and the settlement of radon daughter particles, respectively. They can be used to estimate the distribution of radon-induced dose in the ventilation networks under different radon exhalation characteristics and ventilation conditions, and control the radon-induced dose in each branch of the ventilation network. This can provide technical support for the design and optimization of radon protection in ventilation networks of underground mine.