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GEOREF RECORD

First evidence of the detection of an underground nuclear magnetic resonance signal in a tunnel

Abstract

During the excavation of underground tunnels and ore mining, accidents related to sudden water inflows often occur. As the only technique used for the direct detection of groundwater, nuclear magnetic resonance (NMR) has advantages for the detection of disaster-inducing water flows. However, NMR has commonly been applied only at the ground surface using large-size loop with several turns (typically tens of meters). For the first time, we demonstrate that the water signal in a tunnel can be directly detected using an underground nuclear magnetic resonance (UNMR) experiment. Specifically, we describe the design of a six-meter multi-turn transmitting coil and receiving coil. By conducting UNMR measurements in the Dadushan Tunnel, located in southwestern China, we not only verified the ability to detect the UNMR signal, but also matched the observed data using a 1D inverse model.


ISSN: 1083-1363
EISSN: 1943-2658
Serial Title: Journal of Environmental & Engineering Geophysics
Serial Volume: 23
Serial Issue: 1
Title: First evidence of the detection of an underground nuclear magnetic resonance signal in a tunnel
Affiliation: Jilin University, College of Instrumentation and Electrical Engineering, Jilin, China
Pages: 77-88
Published: 201803
Text Language: English
Publisher: Environmental and Engineering Geophysical Society, Englewood, CO, United States
References: 31
Accession Number: 2018-032296
Categories: Engineering geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch maps
N30°30'00" - N31°49'60", E120°49'60" - E122°00'00"
N25°04'00" - N25°04'00", E102°40'60" - E102°40'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, copyright, Environmental & Engineering Geophysical Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201817
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