The dual transmitter implements the equivalent anti-magnetic flux
transient electromagnetic method, which can effectively reduce the scope of the
transient electromagnetic detection blind area. However, this method is rarely
reported in the detection of pipelines in urban geophysical exploration and the
application of coal mines. Based on this, this paper realizes the equivalent
anti-magnetic flux transient electromagnetic method based on the dual launcher.
The suppression effect of this method on the blind area is analyzed by physical
simulation. And the detection experiment of underground pipelines is carried
out outdoors. The results show that the dual launcher can significantly reduce
the turn-off time, thereby effectively reducing the impact of the blind area on
the detection results, and the pipeline detection results verify the device’s
effectiveness. Finally, based on the ground experimental results, the
application prospect of mine advanced detection is discussed. Compared with
other detection fields, the formation of blind areas is mainly caused by the
equipment. If the dual launcher can be used to reduce the blind area, the
accuracy of advanced detection can be improved more effectively. The above
research results are of great significance for improving the detection accuracy
of the underground transient electromagnetic method.
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