物探化探计算技术2025，Vol.47Issue(2)：272-281,10.DOI:10.12474/wthtjs.20231123-0002
半航空瞬变电磁法在西南山区隧道勘察应用研究
Research on the application of the semi-aeronautical transient electromagnetic method in tunnel investigation in southwest mountainous areas
摘要
Abstract
In collecting geophysical data for tunnels,due to the steep terrain,conventional ground geophysical equipment and personnel are often unable to reach the central line of the tunnel,resulting in large sections of missing geophysical data.In view of the data loss problem due to steep terrain in the collection of tunnel geophysical data,this paper explores the applicability of the semi-airborne transient electromagnetic method in tunnel surveys.The planar characteristics of the three components of induced electromotive force are simulated through forward modeling algorithms.It is found that when measuring on one side only,the z-component of the electromagnetic field does not exhibit field value inversion.The impact of variations in the thickness and resistivity of the intermediate layer on electromagnetic response values within the K and H models was examined.The results show that,under the same geoelectric parameters,the response value of the z-component is significantly higher than those of the x and y components,and in the later stage,the relative anomaly of the y-component is smaller than those of the x and z components.Ultimately,the resistivity profile obtained from a survey conducted along a highway tunnel was analyzed in conjunction with the drilling results,demonstrating a high degree of correlation.This evidence confirms that the semi-airborne transient electromagnetic method can effectively perform tunnel surveys.关键词
半航空瞬变电磁法/三分量/隧道勘察/正演模拟Key words
semi-aeronautical transient electromagnetic method/three-component/tunnel investigation/forward simulation分类
天文与地球科学引用本文复制引用
张东清,张赛民,王献,杨正东..半航空瞬变电磁法在西南山区隧道勘察应用研究[J].物探化探计算技术,2025,47(2):272-281,10.基金项目
电磁勘察(2020开放基金)(40100-02020410) （2020开放基金）
