强干扰环境下铁矿导水通道精细探测研究

doi:10.11720/wtyht.2022.1610

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Abstract

To achieve the accurate positioning of the water-conducting channels in the areas with unknown anomalous water inrush in the Beiminghe iron mine to ensure the safe production of the mine, this study explored the 11# across-vein roof at -110 m level in this iron mine using the mine transient electromagnetic method (MTEM). Firstly, this study briefly introduced the basic principle of MTEM and theoretically analyzed the characteristics of mine transient electromagnetic response under metal interferences. Then, it analyzed the geophysical characteristics based on the geology of the iron mine and corrected the measured data targeting metal interferences using the coefficient correction method. Afterward, the measured data were used as the initial model for the inversion of full-space transient electromagnetic using the bee colony algorithm, obtaining the high-resolution resistivity images of the working face roof. The images combined with the existing geological data allow for the fine detection of water-rich anomalous areas and water-conducting channels, and the detection results were verified by drilling. The results show that the MTEM can effectively improve the detection accuracy of water-rich anomalous positions in the roof strata of the working face in iron mines by means of effective data processing, thus providing effective technical support for water control in iron mines.

Key words： strong interferences iron mine mine transient electromagnetic method water abundance fine detection

Received: 19 November 2021 Published: 03 January 2023

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	Articles by authors
	Rong-Jun WANG
	Chao-Qun ZHOU
	Jie CUI
	Ming-Xing XIE
	Zhuang-Jie QIN

Cite this article:

Rong-Jun WANG,Chao-Qun ZHOU,Jie CUI, et al. Fine detection of water-conducting channels in iron mine under strong interferences[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1396-1402.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1610 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1396

The "smoke ring" of mine transient electromagnetic

Schematic diagram of mine transient electromagnetic detection model

the attenuation curve with metal interference

Layout of mine transient electromagnetic survey line

Attenuation curve before and after metal interference correction

Attenuation curve before and after 150-point metal interference correction

Comparison of the correction of metal interference(a) before correction (b) after correction

Inversion of resistivity by bee colony algorithm

List of actual disclosures of drilling

The results of drilling peep

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