煤样射气系数的测定及其影响因素的探讨

Measurement for Radon Emanation Coefficients of Coal Samples and Analysis of influence Factors of Results

介绍了煤样氡射气系数测量方法,应用该方法测量了全国不同地区多个煤样的氡射气系数。根据测量结果分析了镭-226比活度、煤样粒径、样品含水率等因素对氡射气系数的影响,研究结果表明:氡的射气系数与煤样中镭-226比活度没有相关性;但与样品的粒径有关,且随粒径减小而增大;样品含水率对测量结果有明显影响,当样品含水率<5%时,氡的射气系数随着含水率的增加而增加,当样品含水率>5%时呈下降趋势。

In the paper a method is introduced, which had been used to measure radon emanation coefficients of coal samples from different regions in china. The influence of the size, water content and specific activity of coal sample on radon emanation coefficient is analyzed from results. The study show that the radon emanation coefficient is independent of specific activity of coal samples, increase when the size decrease and have a relation with water content, it decline along with increasing of the water content when water content below 5%, however it decrease when water content above 5% .