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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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

Received: 13 April 2022 Published: 05 July 2023

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Zhao-Hua Qi. 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[J]. Geophysical and Geochemical Exploration, 2023, 47(3): 700-706.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.1178 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I3/700

Statistical table of borehole logging resistivity in the study area

Survey line layout

Comparison of experimental results with different transceiver distances

Experimental results of different receiving electrode distances (MN)

The comparison between resistivity logging results and wide-area electromagnetic sounding results

Wide field electromagnetic inversion resistivity section and geological section of line 4100

Wide field electromagnetic inversion resistivity section and geological section

Superposition diagram of 1 coal seam bedding resistivity and roadway excavation

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