瞬变电磁法在某铁矿岩层富水性探测中的应用

Application of Transient Electromagnetic Method in Detection of Water Abundance of an Iron Ore Formation

矿井顶底板岩层富水性探测是矿井防治水工作中的重点。通过瞬变电磁技术,对某铁矿-230 m中段主运巷进行顶底板岩层富水性探测,根据瞬变电磁响应数据,对不同探测方向进行富水异常区分析,结合三维成像技术对富水区圈定。结果表明在-230 m富水异常区有两处,主要分布在横向距离0~40 m、80~110 m、140~190 m,纵向距离20~40 m范围的富水异常区以及顶板方向横向距离40 m至200 m,纵向距离80~100 m范围的富水异常区,这能够有效指导矿区防治水工作。

The detection of water abundance in the roof and floor strata of mines is a key aspect of water prevention and control work in mines.With transient electromagnetic technology,the water abundance in the roof and floor strata of the main haulage roadway of a certain iron mine in the middle section of-230 m is detected.Based on transient electromagnetic response data,the water abundance anomaly areas are analyzed in different detection directions,and the water abundance areas are delineated using three-dimensional imaging technology.The results show that there are two areas with abnormal water abundance at-230 m,mainly in the areas with abnormal water abundance with horizontal distances of 0~40 m,80~110 m and 140~190 m,and longitudinal distance of 20~40 m,as well as in the areas with abnormal water abundance at the roof direction with horizontal distances of 40 m to 200 m and longitudinal distances of 80~100 meters.This can effectively guide the water prevention and control work in mining areas.