广域电磁法在巨厚低阻层下水文地质勘探中的应用——以安徽淮南某煤矿为例

doi:10.11720/wtyht.2023.1178

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摘要

为探测巨厚低阻层下部的煤层顶底板含水层中的富水性,在安徽淮南地区进行了煤矿广域电磁法的水文地质勘探工作,经过试验分析、数据采集、资料解释等多种手段获得的地质成果与井下揭露情况吻合良好。广域电磁法在煤矿水文地质勘探中的成功应用实例,表明该方法具有穿透能力强、探测深度大、精度高的特点,可以作为一种新兴的物探手段用于大深度煤田水文地质调查工作。

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	齐朝华

关键词 ：广域电磁法, 煤矿, 富水性, 水文地质

Abstract：

To investigate the water yield properties of the aquifers in the hanging and foot walls of coal seams under the extremely-thick low-resistivity layer, this study conducted the hydrogeological exploration using the wide-field electromagnetic method (WFEM) targeting a coal mine in the Huainan area, Anhui Province. The geological results obtained through multiple means, such as test analysis and data acquisition and interpretation, agree well with the downhole conditions. As indicated by the successful WFEM application in the hydrogeological exploration of the coal mine, the WFEM features strong penetrability, large investigation depth, and high accuracy. Therefore, the WFEM can be used as a new geophysical exploration method for the hydrological survey of large-depth coal fields.

Key words： wide-field electromagnetic method coal mine water yield property hydrogeololgy

收稿日期: 2022-04-13 修回日期: 2023-02-08 出版日期: 2023-06-20

ZTFLH:

P631.1

基金资助:中国煤炭地质总局地球物理勘探研究院科研项目(JBGS-2022-02)

作者简介: 齐朝华(1984-),男,高级工程师,主要从事电磁法勘探及研究工作。Email:qizhaohua@126.com

引用本文:

齐朝华. 广域电磁法在巨厚低阻层下水文地质勘探中的应用——以安徽淮南某煤矿为例[J]. 物探与化探, 2023, 47(3): 700-706.
Qi Zhao-Hua. Application of the wide-field electromagnetic method in hydrogeological exploration under the extremely-thick low-resistivity layer: A case study of a coal mine in the Huainan area, Anhui Province. Geophysical and Geochemical Exploration, 2023, 47(3): 700-706.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2023.1178 或 https://www.wutanyuhuatan.com/CN/Y2023/V47/I3/700

Table 1 30-5孔测井电阻率统计

Fig.1 测线布置示意

Fig.2 不同收发距实验结果对比

Fig.3 不同接收极距(MN)实验结果

Fig.4 电阻率测井结果与广域电磁法测深结果对比

Fig.5 4100线广域电磁反演电阻率断面及地质剖面

Fig.6 研究区广域电磁法反演电阻率断面

Fig.7 1煤顺层电阻率切片与巷道掘进叠加图

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