矿井瞬变电磁法在探查豫西某金属矿井下导水通道中的应用  

Application of mine transient electromagnetic method in exploring underground water channel of a metal mine in western Henan

作　　者：苏彦龙 SU Yanlong(Geophysical and Spatial Information Institute corporation of Henan Province,Zhengzhou 450009,China;Geology and Geophysics Engineering Technology Research Center of Henan Province,Zhengzhou 450009,China)

机构地区：[1]河南省地球物理空间信息研究院有限公司,河南郑州450009 [2]河南省地质物探工程技术研究中心,河南郑州450009

出　　处：《世界核地质科学》2024年第6期1214-1225,共12页World Nuclear Geoscience

摘　　要：豫西某金属矿巷道顶板裂隙淋水严重存在安全隐患。为寻找岩层裂隙导水通道位置,封堵出水点。选用矿井瞬变电磁法采用重叠回线装置在巷道掘进头处进行超前探测。对线框匝数、线框边长和叠加次数等开展参数试验,选择最优施工参数,采集并绘制出视电阻率断面图。结果显示:增加发射线框匝数可以增强电磁信号;增加接收线框的匝数可以提高信噪比;线框边长越大其探测深度越大,获得的深层信息越多;增加叠加次数使采集的数据更稳定,压制干扰的效果更好。通过本次试验及应用,采用矿井瞬变电磁法可以探测到导水通道的大致走向,经钻探验证圈定的富水异常区位置准确,为类似矿井寻找导水通道提供借鉴意义。Roof fissure watering brings serious hidden safety hazard to a metal mine roadway in western Henan province.To find the position of water channel in rock fracture and block the water outlet point,mine transient electromagnetic method was used to carry out in advanced detection at the roadway tunneling head by using the overlapping loop device.Through the test of wireframe turns,wireframe side length and superposition times,the optimal construction parameters was selected to frame can collect and draw the apparent resistivity profile.The test result showed that increasing the number of turns of the transmitting wire would enhance the electromagnetic signal,increasing the number of turns of the receiving wireframe could improve the signal-tonoise ratio,the longer the wireframe side would enlarge the detection depth and got the deeper information,and increasing the superposition time would make the data more stable and the better suppressing interference effect.The mine transient electromagnetic experiment detection roughly the location of the water-rich anomaly area which was delineated accurately by drilling verification and provided a reference for similar mine roadways to find water channel.

关 键 词：矿井瞬变电磁法 重叠回线 导水通道 

分 类 号：P631.3[天文地球—地质矿产勘探]