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Regularity of Transient Electromagnetic Methods for Detecting Hydrous Unfavorable Geological Body in Tunnel
Author(s): 
Pages: 214-218
Year: Issue:  5
Journal: Highway

Keyword:  瞬变电磁法超前地质预报不良地质体地下水;
Abstract: 瞬变电磁法是一种对水体较为敏感的预报方法,为探索瞬变电磁法对探测隧道含水不良地质体的探测规律,通过现场大量瞬变电磁法探测实例,总结其对涌水通道、含水溶洞、含水裂隙的反应规律,以及后方低阻体对探测的干扰影响.结果表明,当探测前方存在含水通道时,视电阻率等值线会在其含水通道所在区域明显降低,且呈条带状分布,条带宽度与管道分布有关;当探测前方存在含水溶洞时,视电阻率等值线会在溶洞所在区域发生弯曲甚至闭合...
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