地空电磁—核磁共振联测方法在地层富水性探测中的应用与研究

Application and Research of Ground-air Electromagnet and Nuclear Magnetic Resonance Joint Survey in Water-rich Detection

针对地层富水对煤炭生产安全的危害,为露天矿富水区探测提供一种新型快速的探测方法。面对研究区地理地质条件,工作区域高压电线、大型露天采掘装备强干扰、矿区复杂地形、高背景电阻率等特殊情况,采用地空电磁探测方法划定富水区、导水通道及含水点,核磁共振方法推断含水层位置、含水量大小等。研究表明,地空电磁-核磁共振探测方法可圈定地下含水区域,评估地下0~100 m的地质水文信息,对含水层的分辨能力效果显著。该方法具有较好的应用前景,为同类矿山提供了参考。

Aiming at the hazard of water-rich strata to the safety in coal production,this study proposes a new and rapid method to detect the water-rich areas in open pit mines.Based on some special circumstances,including the geographical and geological conditions of the study area,high voltage power lines in the working area,strong interference from large open-pit mining equipment,complex topography of the mining area,and high background resistivity,we found that,while the ground-air electromagnetic detection method could detect the water-rich areas,water-conducting channels,and water-bearing points,the nuclear magnetic resonance(NMR)method could determine the aquifer position and water content.The study shows that the joint survey with ground-air electromagnetic detection and NMR method could circle the water-bearing area and evaluate the geohydrological information(from 0 to 100 m underground),with significant distinguishing ability,which has a good application prospect and could provide a reference for similar mines.