Method for measuring uranium mine air return shaft radon emissions

Provided is a method for measuring uranium mine air return shaft radon emissions. Firstly, a multi-point method is adopted to perform radon concentration measurement on the specific sample points at the uranium mine air return shaft head, and average outlet air speed and average radon concentration in a radial specific area at the air return shaft head are calculated, and the product of the average air speed value and radon concentration mean value of each area and the area of the specific area is weighted to calculate the radon release rate of the air return shaft. For a specific air return shaft, a constant numerical relationship exists between the release rate and the shaft center air speed and the shaft center radon concentration of a cross section and the area of the cross section, and the conversion coefficient of the air return shaft is obtained based on the rule and through the calculation of measured data. In the subsequent measurement of the radon release rate of the uranium mine air return shaft, one only needs to measure the shaft center radon concentration and air speed of the cross section of the air return shaft, multiplies the radon concentration and air speed values by the conversion coefficient and the sectional area of the air return shaft outlet to obtain the radon release rate of the uranium mine air return shaft, and then multiplies the radon release rate by the radon emission time of the air return shaft to calculate the radon emission value of the uranium mine air return shaft.