测氡法和瞬变电磁法在探测煤矿采空区的应用

THE APPLICATION OF RADON MEASUREMENT AND TRANSIENT ELECTROMAGNETIC METHODS IN DETECTION OF COAL MINE GOAF

介绍了活性炭测氡法探测采空区的基本原理。用测氡仪器测量其氡的衰变子体放射出伽马射线的强度,从而了解氡气浓度的高低,便可知采空区的位置。根据采空区的地球物理特征,利用瞬变电磁法,通过分析拟视电阻率断面图,准确地探测出了采空区的位置。以探测山西省西山煤电集团有限公司东曲矿采空区为例,来说明活性炭测氡法和瞬变电磁法在探测采空区是可行的。

This paper deals with the basic principle of the radon measuring method for detecting goaf. The authors measured the γ radial intensity of radon daughter in the adsorber so as to understand the scale of radon thickness and hence get to know the position of the coal mine goal. On the basis of geophysical characteristics of goal and by using the transient electromagnetic method and analyzing the apparent resistivity section, the authors accurately located the goal. Exemplified by detecting the goaf of the Dongqu mine affiliated to the Xishan Mine Electricity Group Corporation of Shanxi Province, this paper holds that the radon measurement and transient electromagnetic methods can be used to explore the coal mine goaf.