全程瞬变电磁法浅层勘探数据的处理方法

快速、高效的地面勘探技术是解决工程建设中遇到的浅层地质问题的关键.基于半空间瞬变电磁勘探理论,利用多匝重叠小回线装置,通过物理实验模拟全程瞬变电磁勘探技术,探讨剔除法处理后的地质异常体对半空间重叠小回线浅层瞬变电磁的响应特征及变化规律.结果表明：瞬变电磁对浅层高低阻异常体响应明显,等值线响应变化规律性强.纯背景条件下剔除仪器自身因素造成的干扰数据体,并对剔除后得到的新数据体进行反演处理,可准确地反映被测地质体的浅层信息.剔除干扰数据体方法对提高瞬变电磁全程勘探能力行之有效,为相关研究提供了借鉴.

Study on application of scalping method in whole course TEM shallow exploration data

This paper develops from the insight that the technology tailored for the rapid and efficient ground exploration holds the key to solving shallow geological problems encountered in the construction.The specific solution involves exploring the response characteristics and change rules of geologic abnormal body treated by scalping method to half-space overlapping little-loop transient electromagnetic device.The exploration draws on the theory of half-space transient electromagnetic exploration,multi-circle overlapping little-loop device,and the whole process physical experiment simulation of the transient electromagnetic exploration technology.The results show that the transient electromagnetic method offers an obvious response to shallow high or low resistance anomalous body,and a stronger contour response change regularity.It follows that the elimination of the interference data body created by the instrument in the case of pure background factors volume and inverse processing of new data body produced by the elimination renders possible a more accurate reflection of the corresponding information of the detected geological body in the shallow stratum.The research on the scalping-method able to improve the ability of the whole process transient electromagnetic exploration,may provide the reference for related research.