湘西北岩溶石山缺水地区直流电法找水实例

doi:10.11720/wtyht.2020.1575

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摘要

湘西北岩溶石山缺水地区地形条件复杂,电磁干扰较强,在地下水勘查工作中,优先选用抗干扰能力较强的直流电法较为适宜。工程实践表明:在地势相对较缓且勘探深度相对较浅(0~150 m左右)时,采用小极距视电阻率联合剖面法+高密度电阻率法;在地形条件较差或勘探深度相对较深(0~400 m左右)时,采用小极距联合剖面法+三极激电测深法,并进行适当的反演与解释,既可提高工作效率又解决了实际问题,取得了较好的找水效果。

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	李望明
	易强
	刘声凯
	肖利权
	李俊

关键词 ：直流电法, 找水, 岩溶地区, 强电磁干扰, 湘西北

Abstract：

In the water shortage area of karst mountain in northwest Hunan, the terrain condition is complex and the electromagnetic interference is strong. In the groundwater exploration, the DC method with strong anti-interference capability is preferred. The engineering practice shows that, when the terrain is relatively gentle and the exploration depth is relatively shallow (about 0~150 m), the small distance combined section method of apparent resistivity + high-density resistivity method is adopted, and when the terrain condition is poor or when the exploration depth is relatively deep (about 0~400 m), the small distance combined section method of apparent resistivity and three-pole IP sounding method are used, and proper inversion and interpretation are carried out, which not only improves the working efficiency but also solves the practical problems, and achieves better water finding effect.

Key words： DC method water exploration karst area strong electromagnetic interference northwest Hunan

收稿日期: 2019-12-13 出版日期: 2020-12-29

P631

作者简介: 李望明(1988-),男,2010年毕业于中南大学,工程师,主要从事水工环物探方法研究与应用工作。

引用本文:

李望明, 易强, 刘声凯, 肖利权, 李俊. 湘西北岩溶石山缺水地区直流电法找水实例[J]. 物探与化探, 2020, 44(6): 1294-1300.
LI Wang-Ming, YI Qiang, LIU Sheng-Kai, XIAO Li-Quan, LI Jun. An example of DC method for water exploration in the karst mountain water shortage area of northwest Hunan. Geophysical and Geochemical Exploration, 2020, 44(6): 1294-1300.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1575 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I6/1294

Fig.1 A村平面示意

Fig.2 A村4线联合剖面曲线(a)、高密度视电阻率拟断面(b)、高密度电阻率反演断面(c)

Fig.3 B村平面示意

Fig.4 B村6线联合剖面曲线

Fig.5 B村6线三极激电测深拟断面与反演断面

Fig.6 B村6线地质推断结果

Fig.7 C村平面示意

Fig.8 C村3线联合剖面曲线

Fig.9 3线三极激电测深视电阻率与视极化率拟断面、反演断面及推断地质剖面

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