摘要
为了研究等值反磁通瞬变电磁法对临澧某石膏矿采空区的探测效果,在矿区布置了两条测线进行等值反磁通瞬变电磁法实验。通过两条测线的结果对比可知,在等值反磁通瞬变电磁法的反演电阻率剖面中,不存在采空区的区域电阻率等值线较平缓、呈层状,基本反映了地层的层状特性;存在采空区的区域电阻率等值线呈明显的下凹特性,且电阻率值较低,为低阻异常带。可见,等值反磁通瞬变电磁法对临澧某石膏矿的采空区探测效果较好,能够确定采空区的基本位置,可以在该矿区或类似矿山开展采空区探测工作。
In order to study the detection effect of opposing coils transient electromagnetics method on the goaf of a gypsum mine in Lin?li,the author arranged two lines in the mining area for the experiment of opposing coils transient electromagnetics method.A line was arranged in the area without goaf.,and the other line was located above the known goaf.By comparing the results of the two lines,it can be seen that,in the inversion resistivity profile of the opposing coils transient electromagnetics method,the resistivity isoline with?out goaf is gentle and layered,which basically reflects the layered characteristics of the strata.The resistivity isoline with goaf is obvi?ously concave,and the resistivity value is low,which is a low resistivity abnormal zone.It can be seen that the opposing coils transient electromagnetics method is effective in detecting the goaf of a gypsum mine in Linli,and can determine the basic location of the goaf.It can be used to detect goaf of gypsum ore in this gypsum mining area or similar gypsum mining areas.
作者
高远
GAO Yuan(Coal Geological Exploration Institute of Hunan Province,Changsha 410014,China)
出处
《物探与化探》
CAS
北大核心
2019年第6期1404-1408,共5页
Geophysical and Geochemical Exploration
关键词
等值反磁通
瞬变电磁法
采空区
石膏矿
equal and reverse magnetic flux
transient electromagnetics method
goaf
gypsum
