核磁共振测深进行隧道超前地质预报的可行性

山东大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (1): 92-97.

核磁共振测深进行隧道超前地质预报的可行性

孙怀凤1,李术才1,李貅2,戚志鹏2,刘磊2,薛翊国1,苏茂鑫1,刘斌1,张文俊1

1. 山东大学岩土与结构工程研究中心,山东济南 250061; 2. 长安大学地质工程与测绘学院, 陕西西安 710054

收稿日期:2012-09-01 出版日期:2013-02-20 发布日期:2012-09-01
作者简介:孙怀凤(1982- )，男，山东邹平人，博士研究生，主要研究方向为电磁探测基本理论及应用. E-mail：sunhuaifeng@gmail.com
基金资助:
国家自然科学基金重点资助项目(51139004); 国家自然科学基金青年科学基金资助项目(40902084，50908134，41102183); 国家重大科学仪器开发专项资助项目(2011YQ030133); 山东大学优秀研究生科研创新基金资助项目(YYX10014)

Feasibility of using magnetic resonance sounding in prediction of water bearing structures in front of a tunnel face

SUN Huai-feng1, LI Shu-cai1, LI Xiu2, QI Zhi-peng2, LIU Lei2, XUE Yi-guo1, SU Mao-xin1, LIU Bin1, ZHANG Wen-jun1

1. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China;
2. College of Geology Engineering and Geomatics, Chang′an University, Xi′an 710054, China

Received:2012-09-01 Online:2013-02-20 Published:2012-09-01

摘要/Abstract

摘要：

针对隧道掌子面前方含水构造有效探测问题,提出了采用核磁共振测深技术进行隧道超前地质预报。以均匀全空间模型为基础,计算了均匀导电全空间中回线源形成的谐变电磁场,模拟了核磁共振超前探测时的扳倒角分布。结果显示隧道核磁共振超前探测时含水体能够产生明显核磁共振响应,但信号较弱。针对地下探测空间的特殊性,提出了以阶跃波代替现有余弦波激发源、以磁探头代替线圈作为接收装置进行改进的建议。核磁共振测深直接找水有望成为一种非常有潜力的探测掌子面前方水体并区分水与泥的有效方法。

关键词: 隧道超前地质预报, 核磁共振测深, 扳倒角, 直接找水, 可行性

Abstract:

The use of magnetic resonance sounding in prediction of water bearing structures in front of a tunnel face was proposed in order to realize the effective detection of water in front of a tunnel face. A homogeneous conductive full space was used as the basic model. The distribution of harmonic electromagnetic response was calculated. Distribution of the magnetic resonance toppled angles in magnetic resonance sounding(MRS) detection on tunnel face was also simulated. The modeling result showed the obvious MRS response from the water in front of a tunnel face, while the amplitude was very small. According to the characteristics of MRS detection in tunnels, it was proposed that the currently cosine excitation source could be replaced with step source and the current receiver coil could be replaced with magnetic probe. MRS is a potential method to detect water and distinguish water and mud.

Key words: tunnel advanced geology prediction, magnetic resonance sounding (MRS), magnetic resonance toppled angle, direct detection of water bodies, feasibility

中图分类号:

P631. 3+25

孙怀凤1,李术才1,李貅2,戚志鹏2,刘磊2,薛翊国1,苏茂鑫1,刘斌1,张文俊1. 核磁共振测深进行隧道超前地质预报的可行性[J]. 山东大学学报(工学版), 2013, 43(1): 92-97.

SUN Huai-feng1, LI Shu-cai1, LI Xiu2, QI Zhi-peng2, LIU Lei2, XUE Yi-guo1, SU Mao-xin1, LIU Bin1, ZHANG Wen-jun1. Feasibility of using magnetic resonance sounding in prediction of water bearing structures in front of a tunnel face[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2013, 43(1): 92-97.

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