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高频大地电磁法是当前在矿产、水文、工程地质、环境等勘探领域广泛应用的物探方法。本文简要介绍了高频大地电磁测深法的基本原理、数据采集和解释技术,并结合福建省某隧道和甘肃省某隧道两个隧道的实地勘探成果,通过分析反演电阻率断面图,认为高频大地电磁法不仅能查明隧道所经地段可能存在的隐伏构造、断裂破碎带和富水区域等,还能查明地表强风化层的厚度。
High-frequency MT is currently widely used geophysical exploration methods in mineral resources, hydrology, engineering geology and environment exploration. This paper briefly introduces the basic principle, data acquisition and interpretation technology of high frequency MTF method. Combining the field exploration results of two tunnels in a tunnel in Fujian Province and a tunnel in Gansu Province, by analyzing the inversion resistivity profile view, The high-frequency MT method can not only find out the hidden structures, broken fracture zones and water-rich areas that may exist in the tunnel, but also check the thickness of the strongly weathered layer on the surface.