瞬变电磁法小回线装置在煤矿水文地质勘探中的应用

Application of Hydrological Exploration in Coal Mine with the TEM Small Loop Device

以晋南地区某煤矿水文勘探为例,针对其复杂的地表条件,分别进行瞬变电磁法大回线装置和小回线装置试验,在进行测区背景噪音调查后,通过点试验和段试验,对比两种装置的原始曲线、反演曲线、试验段反演成果和高压线影响范围,结果表明两种装置的电性分层能力基本相同,但小回线装置相比大回线装置施工方式灵活,占地面积小,体积效应小,更适合在地表复杂条件下完成地质勘探任务要求。

Taking the hydrological exploration of a coal mine in southern Shanxi as an example,in view of the complex surface conditions,the experiments of the TEM large loop regimen and small loop regimen are carried out respectively.After investigating the background noise in the survey area,through point test and segment test,comparing the original curve,inversion curve,inversion results of the test section and the influence range of the high-voltage line of the two devices,the results show that the stratigraphic electrical characteristics of the two devices is basically the same.However comparing with the large loop regimen,the small loop regimen has below characters,such as more flexible layout,covering less ground area,and smaller volum effect,which is more suitable for taking hydrological exploration tasks on complex surface conditions.