Estimation of the penetration angle of a man-made tunnel using time of arrival measured by short-pulse cross-borehole radar
- Estimation of the penetration angle of a man-made tunnel using time of arrival measured by short-pulse cross-borehole radar
- 김상욱; 김세윤; 남상욱
- tunnel; borehole; radar
- Issue Date
- VOL 75, NO 3, J11-J18
- The relatively fast propagation of electromagnetic signals
through empty man-made tunnels has played a key role in detecting
deep underground tunnels using a short-pulse crossborehole
radar system. Our cross-borehole radar system
measured the pulse signatures of an obliquely penetrating
tunnel using eight different borehole pairs at a test site in Korea.
Compared to the arrival times of the first peaks, the arrival
times of the first received signals at an appropriate amplitude
level provided an increasingly clear indication of the
empty tunnel as its penetration angle becamemore oblique.A
quadratic relationship between the arrival time of the first received
signal and the oblique angle of the empty tunnel was
obtained in pure granite.
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- KIST Publication > Article
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