Application of Transient Electromagnetic Method in saturation region detection in tailings dam

DOI

10.2991/iceeg-16.2016.85How to use a DOI?

Keywords

transient electromagnetic method (tem) , apparent resistivity, vertical first derivative, dam ' s saturation line formatting

Abstract

Since the 1950 s, Taolin ore has been exploited. Almost a hundred tons of tailing were backfilled between the hills for a long time, which formed Taolin dam during 50 years backfilling deposition. The stability of the huge dam is of great importance for the local people's life and property protection. The transient electromagnetic method has been widely used in engineering survey, it provides kinds of configurations, can meet the demand of survey area with complex terrain. In this paper, TEM application is discussed in the detection field of dam saturation region. Firstly, this paper introduces the basic principle of transient electromagnetic method to detect saturation region. In the Multi-channel voltage profile in time domain and the apparent resistivity proposed cross-section diagram, there is obviously anomaly "High voltage- low resistance" in saturation region. Secondly, in order to highlight the vertical profile resistivity change, the vertical first derivative of the apparent resistivity cross-section is calculated. In the apparent resistivity vertical derivative anomaly map, the top of saturation region shows minimum negative gradient anomalies. The size of layers are clearly divided. The results shows that saturation region is almost below the horizontal plane, safe height, which provides reliable geological theory basis for Taolin tailings dam safety evaluation.Our results suggest that TEM has high detection accuracy. In the field of groundwater prospecting, transient electromagnetic method can be used as an important tool of prospecting.

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/).

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TY  - CONF
AU  - Yingsa Hu
AU  - Zhaofa Zeng
AU  - Xiong Chen
AU  - Xueyu Zhao
PY  - 2016/06
DA  - 2016/06
TI  - Application of Transient Electromagnetic Method in saturation region detection in tailings dam
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  - 316
EP  - 319
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.85
DO  - 10.2991/iceeg-16.2016.85
ID  - Hu2016/06
ER  -