地下工程灾害水源的磁共振探测研究

Underground Magnetic Resonance Sounding(UMRS)for detection of disastrous water in mining and tunneling

地面磁共振探测(Surface Magnetic Resonance Sounding,SMRS)是近年来发展起来的一种地球物理新方法,这种在地面直接探测地下介质中氢核丰度的技术,不仅可以用于缺水地区的地下水资源勘查与评价,还可以在地下水引起的堤坝渗漏、滑坡、海水入侵等地质灾害水源的探测预警中发挥独特的作用.本文首次提出了地下磁共振探测方法(Underground Magnetic Resonance Sounding,UMRS),将SMRS方法引入到地下工程领域,实现隧道工程和煤矿开采等地下狭窄空间极端环境的探测.为应用UMRS方法,需要深入研究地下水超前探测理论、准全空间处理与反演方法、旋转多匝小线圈探测模式,强电磁干扰环境自适应噪声压制策略、以及复杂地质环境磁共振与瞬变电磁联合探测关键技术等难题.论文还简要介绍了超导磁探测技术和工程盾构及掘进实时探测等新技术在地下工程生产安全探测预警中的应用前景.

Surface Magnetic Resonance Sounding （SMRS） has emerged as a new geophysical technique which allows detecting the abundant degree of hydrogen nucleus in the subsurface directly on the surface.It has been widely used,not only in groundwater exploration and evaluation,but also in water-induced disasters （disasters caused by groundwater,such as dam leakage,landslides and seawater intrusion） forewarning.This paper discusses how to introduce SMRS into the detection and prediction of production safety in underground engineering and achieve MRS exploration in the extreme environments （narrow spaces including tunneling project and coal mining）,which we call it Underground Magnetic Resonance Sounding （UMRS）.To this goal,some challenges has to overcome when UMRS is carried out in underground engineering,including advance detection theories,detection by small coils in narrow space,adaptive signal processing for suppressing electromagnetic noise,quasi-whole space forward modeling and inversion strategies,the processing and inversion of quasi-full space 2D/3D disaster water detection data,as well as joint detection of MRS and TEM methods in complex geological environments like karst aquifers.We also briefly introduce superconducting detection technology and real-time detection technologies for shield and driving methods in underground engineering.