Application of mine transient electromagnetic method in exploring underground water channel of a metal mine in western Henan
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-to-noise 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.
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