Experimental study on transient electromagnetic method with a conical source

Authors

YANG Haiyan, School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
LIU Zhixin, School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, ChinaFollow
ZHANG Hua, School of Geophysics and Measurement-Control Technology, East China University of Technology, Nanchang 330013, China
CHEN Xiao, School of Geophysics and Measurement-Control Technology, East China University of Technology, Nanchang 330013, China
LIAN Zhe, School of Geophysics and Measurement-Control Technology, East China University of Technology, Nanchang 330013, China
WANG Ling, School of Geophysics and Measurement-Control Technology, East China University of Technology, Nanchang 330013, China
YANG Fujie, School of Geophysics and Measurement-Control Technology, East China University of Technology, Nanchang 330013, China

Abstract

A new transmitter device-conical source has been proved theoretically to have several advantages for transient electromagnetic sounding. To verify application ability of conical source, two kinds of transmitter devices were designed and made, and the experimental studies on surface and in mine roadway were carried out. By applying high density resistivity achievements in surface experiment, the detecting results using conical source and multi-coils were compared. The results show that the description of strata resistivity with conical source is better than that with multi-coils. One fault was identified and the strike and position of which matches the high density resistivity result better. Meanwhile, experiment results in mine roadway also show that the conical source can achieve more effective delineation of low resistivity zone than multi-coils; the low resistivity zone in multi-coils section was turned out to be two discontinuous areas in conical source section. In addition, the conical source has a higher resolution of conductor in mine drift. The shape and area of conical source are more stable, which is more helpful to improve the efficiency and data quality of the transient electromagnetic method.

Keywords

transient electromagnetic method, conical source, high density resistivity method, apparent resistivity, advanced detection

DOI

10.3969/j.issn.1001-1986.2021.06.013

Recommended Citation

YANG Haiyan, LIU Zhixin, ZHANG Hua, et al. (2021) "Experimental study on transient electromagnetic method with a conical source," Coal Geology & Exploration: Vol. 49: Iss. 6, Article 14.
DOI: 10.3969/j.issn.1001-1986.2021.06.013
Available at: https://cge.researchcommons.org/journal/vol49/iss6/14

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