瞬变电磁法在铁矿采空区探测中的应用

为了更加准确地掌握铁矿采空区的分布，根据瞬变电磁法和磁法勘探原理，对铁矿采空区的综合地球物理特征进行研究，结合测区内铁矿采空区的特点，给出铁矿采空区的评判原则，认为磁铁矿相对围岩具有高磁性、低电阻的特性，对于不充水的采空区具有高电阻率的特性，对于塌陷或充水的采空区具有低电阻率的特性。使用V8电法仪和GSM-19T磁力仪对安阳某铁矿采空区进行瞬变电磁和磁法探测，圈定铁矿采空区及积水区的形态。结果表明，瞬变电磁法技术在查找铁矿采空区的效果良好。

Application of transient electromagnetic method in detecting goafs of iron mine

In order to more accurately grasp the distribution of iron ore goafs，according to the principles of transient electromagnetic and magnetic exploration，the comprehensive geophysical characteristics of iron ore goafs were studied，combined with the characteristics of iron ore goafs in the survey area，the evaluation principle of the iron ore mined area was given and it was considered that magnetite has high magnetic properties and low resistance relative to the surrounding rock，and it had high resistivity characteristics for unfilled mined area and collapsed or water filled mined area.The zone has a characteristic of low resistivity.Transient electromagnetic and magnetic methods were used to detect the goaf of an iron mine in Anyang by using V8 electrical method instrument and GSM-19T magnetometer to delineate the shape of the iron mine goaf and water accumulation area.The results show that the transient electromagnetic method is effective in finding iron ore goafs.