Accession Number:

ADA089141

Title:

Tunnel Detection

Descriptive Note:

Technical rept.

Corporate Author:

SRI INTERNATIONAL ARLINGTON VA

Personal Author(s):

• Vesecky, J. F.
• Nierenberg, W. A.
• Despain, A. M.

Report Date:

1980-04-01

Pagination or Media Count:

110.0

Abstract:

This report investigates the problem of detecting tunnels it focuses on the characteristics of the propagating medium and on techniques using compressional seismic P and electromagnetic EM waves propagating between sources and sensors located in boreholes at depths comparable with the tunnel for which one is searching. The interaction of P and EM waves with tunnels and with the surrounding media is studied as are detection methods in a general sense. This work has not looked into the specifics of sources, sensors and ambient noise levels. Author

Descriptors:

• *SEISMIC DETECTION
• *TUNNELS
• COMPRESSION
• NORTH KOREA
• CRACKS
• ACOUSTIC DETECTION
• ELECTROMAGNETIC WAVE PROPAGATION
• ELECTRICAL PROPERTIES
• GRANITE
• ROCK
• BOREHOLES
• SOILS
• WAVE PROPAGATION
• SEISMIC WAVES
• RADAR SIGNALS
• AMBIENT NOISE
• VERY HIGH FREQUENCY
• UNDERGROUND

Subject Categories:

• Geology, Geochemistry and Mineralogy
• Seismology
• Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE