库尔勒断层氡气观测实验研究

根据库尔勒断层氡气在观测中遇到的一些问题，做了一系列观测实验，结果表明，氡探头的标定值的大小反映了氡探头的灵敏度，决定了测值的高低，因为地下１ｍ内的浅层气体与大气连通，所以观测值受气象因素影响较大，同时认为，在土壤相对潮湿的寒冷地区，冬季较厚的冻土层形成了良好的封闭系统，使地下氡气浓度相对增高，测值呈“冬高夏低”的变化形态，实验中还根据氡的衰变规律验证了所观测的大幅变化的测值确为氡气含量。

STUDY ON EXPERIMENTS OF FAULT GAS RADON OBSERVATION IN KUERLE

In order to make some questions clear encountered in the observation of fault gas radon in Kuerle,a series of experiments are done.The result shows:(1)the sensitivity of radon sonde decides the size of observed value,i.e.,when the sonde with big calibration value,the observed value is high(the same to the opposite);(2) the observed value is affected by meteorological factors obviously because of the connection of shallow layered gas within 1 m underground with atmosphere;(3)in the cold area where soil is relatively wet,the thicker frozen soil layer forms a closure system in winter,causing underground radon content to be higher than in summer;thereby,the observed value shows high in winter and low in summer shape variation.In addition,the experiments also prove the large amplitude variation of observed value tallies with the decay law of radon,so the value that is observed is the real content of radon.