Physical simulation and application of a new TEM configuration
Physical simulation and application of a new TEM configuration
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一种新的TEM结构的物理模拟和应用
DOI：
10.1007/s12665-012-1572-8
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发表时间：
2012-02
影响因子：
2.8
通讯作者：
Zhou, N. N.
中科院分区：
文献类型：
--
作者：
Li, X.;Quan, H. J.;Jaggar, S.;Zhou, N. N.
在一些应用中，特别是隧道勘测和古墓勘测，勘测位置的规模很小，不可能铺设足够大的发射环路进行检测。必须采用小规模高功率瞬态电磁 (TEM) 发射器配置来检测更远的距离或更深的深度。重新设计 TEM 测量配置可能有助于提高 TEM 探测的信号穿透力和精度。基于物理模拟，引入了一种新设计的特殊环路源 TEM 测量配置，该配置在单个大型发射器环路中采用四个方形孔径来激发更强的场。针对不同的接收器-发射器间隔和不同的目标深度，使用新的特殊环路系统和标准普通单环 TEM 配置测量了初级和次级场。比较响应曲线表明，与标准系统相比，特殊环路发射系统的一次场强度和二次场响应得到了改善。新的特殊环路配置可用于隧道 TEM 预测和其他 TEM 研究。对中国湖北省的隧道预报进行了案例研究。这项 terra TEM 调查表明，它是在开挖过程中探索和预测隧道壁前方具有挑战性的地质结构的有效且成功的方法。
In some applications, especially for tunnel surveys and ancient tomb investigations, the scale of survey location is so small that it is impossible to lay a large enough transmitter loop for detection. A small-scale and high-power Transient Electromagnetic (TEM) transmitter configuration must be adapted to detect longer distance or greater depth. Redesigning the TEM surveying configuration may facilitate improving signal penetration and precision of TEM soundings. Based on physical simulation, a newly designed special-loop-source TEM survey configuration has been introduced, which employs four square apertures within a single large transmitter loop to excite stronger fields. The primary and secondary fields have been measured using both the new special-loop system and standard normal single loop TEM configuration for different receiver-transmitter separations and for different target depths. The response curves were compared, revealing that the primary field intensity and the secondary field response were improved by the special-loop transmitter system as compared to the standard system. The new special-loop configuration can be used for tunnel TEM prediction and other TEM investigations. A case study was conducted on tunnel forecasting in Hubei Province, China. This terra TEM survey showed that it is an effective and successful method for exploring and predicting challenging geological structures ahead of a tunnel wall during excavation.
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影响因子：
3.3
作者：
M. Goldman;D. Fitterman
通讯作者：
M. Goldman;D. Fitterman
影响因子：
3.3
作者：
A. Raiche
通讯作者：
A. Raiche
DOI：
10.1190/1.1885908
发表时间：
1997
期刊：
Seg Technical Program Expanded Abstracts
影响因子：
--
作者：
M. Zhdanov;Weidong Li
通讯作者：
M. Zhdanov;Weidong Li
影响因子：
5.2
作者：
G. Xue;Y. Yan;X. Li
通讯作者：
G. Xue;Y. Yan;X. Li
影响因子：
64.8
作者：
Jennifer Roe;Steve Roberts
通讯作者：
Jennifer Roe;Steve Roberts