A Method to Extract and Eliminate TEM Interference by Metallic Bodies in Tunnel Geological Anomaly Forecast
A Method to Extract and Eliminate TEM Interference by Metallic Bodies in Tunnel Geological Anomaly Forecast
复制标题
隧道地质异常预报中金属体TEM干扰提取与消除方法
DOI：
10.1520/gtj20160287
复制
发表时间：
2017-12
影响因子：
1.6
通讯作者：
Wang Yetian
中科院分区：
文献类型：
--
作者：
Zhou Dong;Liu Zonghui;Liang Robert Y;Wu Heng;Wang Yetian
瞬变电磁法（TEM）是一种地球物理勘探技术，广泛应用于矿产勘探、水文地质调查和地下地质填图等领域。近年来，该方法在隧道施工中得到了应用，用于预测掌子面前方地质异常。然而，TEM响应可能会受到金属物体（如挖掘车和金属支撑结构）的影响，这使得解释更加困难。本研究的目的是双重的：引入一种新的方法，用于提取和消除TEM干扰的金属体在隧道开挖环境中，并获得洞察力的影响，金属物体上的TEM响应的物理建模在实验室和现场进行的研究。引入了电阻率极限的概念，这些极限可用作反演过程中的特征值，从而实现对具有高电阻率的围岩中的球形低电阻率异常（断层泥物质）的位置和大小的更准确的识别。物理实验室模拟和现场实验都提供了对金属物体（如钢拱或挖掘车）对TEM响应的干扰效应的见解。隧道内的现场试验表明，受试挖掘车与隧道掌子面之间影响TEM响应的最大距离为30 m，而钢拱的最大影响距离在线圈垂直面为1 m，在轴向为2 m。该反演方法能够有效地提取TEM响应中的金属干扰，提高了TEM解释识别地质异常的精度。
The transient electromagnetic (TEM) method is a geophysical exploration technique used in a wide range of applications such as mineral exploration, hydrogeology surveys, and underground geological mapping. In recent years, it has been applied in tunnel construction to forecast geological anomalies in front of the excavation face. However, the TEM response can be affected by metallic objects such as excavation carts and metallic support structures, which makes interpretation more difficult. The purpose of this study is twofold: to introduce a new method for extracting and eliminating TEM interference from metallic bodies in a tunnel excavation environment and to gain insight regarding the influence of metallic objects on the TEM response by physical modeling in the laboratory and studies conducted in the field. The concept of resistive limits is introduced; these limits can be used as eigenvalues in the inversion process, thus achieving more accurate identification of both the location and size of ball-shaped, low-resistivity anomalies (gouge materials) in surrounding rock that has high resistivity. Both the physical laboratory simulations and the field experiments provide insight on the interference effect of metal objects such as a steel arches or excavation carts on the TEM response. Field experiments inside a tunnel indicate that the maximum distance between the excavation cart tested and the tunnel face that can influence the TEM response is 30 m, while the maximum influence distance of a steel arch is 1 m in the vertical plane of the coil and 2 m in the axial direction. The proposed inversion process was shown to be capable of extracting the interference of metallic objects from TEM responses and improve the accuracy of TEM interpretation in identifying geological anomalies.
登录
查看更多内容
DOI：
10.1016/j.ijmst.2012.08.013
发表时间：
2012-09
影响因子：
11.8
作者：
Wang, Bo;Liu, Shengdong;Yang, Zhen;Wang, Zhijun;Huang, Lanying
通讯作者：
Huang, Lanying
一种新的TEM结构的物理模拟和应用
影响因子：
2.8
作者：
Li, X.;Quan, H. J.;Jaggar, S.;Zhou, N. N.
通讯作者：
Zhou, N. N.
影响因子：
2
作者：
M. Ezersky;A. Legchenko;A. Al-Zoubi;E. Levi;E. Akkawi;K. Chalikakis
通讯作者：
M. Ezersky;A. Legchenko;A. Al-Zoubi;E. Levi;E. Akkawi;K. Chalikakis
DOI：
10.1016/s1674-5264(09)60022-3
发表时间：
2009
期刊：
Mining Science and Technology (china)
影响因子：
--
作者：
Bokai Hu;J. Yue;Haiping Yang
通讯作者：
Bokai Hu;J. Yue;Haiping Yang
影响因子：
0.9
作者：
E. Stolz;J. Macnae
通讯作者：
E. Stolz;J. Macnae