Primary Research on Off-resonance Response of Underground Magnetic Resonance Sounding in Tunnel

DOI

10.2991/iceeg-16.2016.80How to use a DOI?

Keywords

MRS; off-resonance, tunnel

Abstract

We present in this paper a forward modelling of the three dimensional off-resonance response of underground MRS used in advanced geological prediction of constructing tunnel. By considering and summarizing the off-resonance response in SNMR, we deduced the off-resonance response of underground MRS. Using three dimensional finite element method, a series of numerical examples are made to elaborate the feature of off-resonance response. We conclude that frequency offset and pulse duration determine the value of the off-resonance response together. Under the excitation of standard pulse (almost 40 ms), receiving voltage could not be reliable as long as frequency offset is larger than 5 Hz; and this frequency offset could be smaller with longer duration of excitation pulse.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Kerui Fan
AU  - Xiu Li
AU  - Shucai Li
AU  - Bin Liu
PY  - 2016/06
DA  - 2016/06
TI  - Primary Research on Off-resonance Response of Underground Magnetic Resonance Sounding in Tunnel
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 296
EP  - 299
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.80
DO  - 10.2991/iceeg-16.2016.80
ID  - Fan2016/06
ER  -