中文摘要：

利用氡渗流-扩散运移理论，建立了爆破铀矿堆内氡运移的一维微分方程，推导出爆破铀矿堆渗流出口表面氡析出率的计算公式，阐述了相关物理参数的确定方法。针对一个具体的留矿法采场，研究了通风量、矿堆高度和矿堆渗透率对氡析出率的影响。结果表明：矿堆的氡析出率随风量的增加而增加，并逐渐接近最大氡析出率，但增长速率随风量的增加逐渐降低；在风量较低且通风量相同的条件下，高度越大的矿堆氡析出率越小，随风量的增加，高度大的矿堆氡析出率逐次超过高度小的矿堆，且差距逐渐增大，高度越大的矿堆达到极限氡析出率的风量越大；矿堆的渗透率越小，氡析出率越低，氡析出率相对风量的增长速率越小，接近极限氡析出率的风量越大。

英文摘要：

One dimensional differential equation for radon migration in the blasted uranium ore heap was established using radon seepage-diffusion migration theory ,the formula for calculating the surface radon exhalation rate at the seepage exit in the blasted uranium ore heap was derived ,and the methods for determining the relevant physical parameters were proposed .For a specific shrinkage stope ,the influences of the air volume for ventilation , ore heap height and ore heap permeability on the radon exhalation rate were studied .The radon exhalation rate of the ore heap increases with the air volume for ventilation and gradually approaches its maximal value , but the growth rate decreases gradually with the increase of the air volume for ventilation . When the air volume for ventilation is small but is kept the same ,the higher the ore heap is ,the smaller the radon exhalation rate is .With the increase of the air volume for ventilation ,the radon exhalation rate of the higher ore heap exceeds successively that of the lower ore heap ,and the difference becomes larger and larger ,and the higher the ore heap is , the larger the air volume for ventilation is for the radon exhalation rate to amount to its maximal value .The smaller the permeability of the ore heap is ,the lower the radon exhalation rate of the heap is , the smaller the growth rate of the radon exhalation rate relative to the air volume is ,and the larger the air volume for ventilation is for the radon exhalation rate to come to its maximal value .