Abstract
Detecting the possibility of water inrush in front of tunnel face is always the key of tunnel advanced geological prediction. Because of its sensitivity to groundwater, transient electromagnetic method is gradually being used in water exploration of tunnel advanced geological prediction. However, the current transient electromagnetic theory is established based on the half-space environment. In order to adapt to the detection work in the full-space environment such as tunnels, different transient electromagnetic devices have been improved. The effectiveness of these improved devices still need to be tested in actual engineering projects. In this paper, a tunnel under construction is used as the engineering background, and different transient electromagnetic devices are placed in front of the same tunnel face for detection. The detection results are compared and analyzed with the actual situation of tunnel excavation, which can provide reference for water exploration of tunnel advanced geological prediction.
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