视电阻率断面图的三维重建

摘要

针对传统的矿井瞬变电磁探测大多以二维视电阻率断面等值线图显示,难以对低阻异常的空间位置及分布范围做出准确的判断,提出一种二维视电阻率断面等值线图的三维重建方法.首先利用阈值分割原理将电阻率断面图的低阻异常区与其他区域分开,然后通过体绘制方法实现低阻异常区域的三维图像显示.实验结果表明,三维重建能够有效显示垂向视电阻率的变化特征,提高了对低阻异常体空间位置的判定.%The traditional mine transient electromagnetic detection results are displayed in the mode of isogram of two-dimensional apparent resistivity section diagram,which is difficult to accurately judge the spatial position and distribution range of low resistivity anomaly. For this problem,a three-dimensional reconstruction method of two-dimensional apparent resistivity section isogram is proposed. The threshold segmentation principle is used to separate the low resistivity anomaly area from other areas,and then the volume rendering method is used to realize the three-dimensional image display of low resistivity anomaly area. The experimental results show that the three-dimensional reconstruction method can display the variation characteristics of vertical apparent resistivity effectively,and improve the judgment accuracy for the spatial position with low resistivity abnormal body.