氡气测量用于地表探测岩溶陷落柱的位置与范围

Locating karst depressed columns by means of Rn measurement on the surface

讨论了地下岩溶陷落柱在地表形成氡气浓度异常的现象。通过α杯测氡法的实验证实，不同类型的岩溶陷落柱可在地表形成不同的氡气浓度异常特征。实际应用表明：氡气测量可在煤炭生产过程中发挥重要作用。

The coal mining and the related surface projects are extremely harassed by the underground karst depressed columns. This paper discussed the surface Rn concentration's abnormality caused by the karst depressed columns. It is concluded that different kinds of karst depressed column can cause different Rn concentration's abnormality. The α-cup Rn measuring instrument was used for detecting Rn abnormality on the surface in order to locate the underground karst depressed columns.