瞬变电磁法在工程勘查找水中的应用

The Application of Transient Electromagnetic Method to Engineering Water Exploration

在以往的工作中,瞬变电磁法大多数情况下都采用分离式线框(大定源)应用于深部矿产勘查工作中,近几年来越来越多村镇找水、建筑工地勘查等也需要进行较大深度的探测。常规的物探方法不是受到场地约束、干扰影响,就是探测深度难以达到要求,而瞬变电磁法采用不接地回线(或探头)接收电磁波信号,且可采用小框工作模式,能够不受场地限制较为有效地采集到有效信号。本文对找水工作实例进行论述,希望在今后的城市物探工作中瞬变电磁法能够发挥更大的作用。

In previous research,the transient electromagnetic method mostly was applied to the deep mineral exploration with separated wireframe（large fixed source）.In recent years,the deeper exploration is needed to carry out in village water exploration and construction site survey.The conventional geophysical exploration methods either are constrained by the site interference,or can hardly meet the exploration depth.However,the transient electromagnetic method uses grounding loop（or probe）to receive the electromagnetic wave signal,with the application of small box working mode,so it can be unconstrained by site and receive signal more effectively.This paper takes one water exploration case as an example and hopes that the transient electromagnetic method can play a more important role in future city prospecting.