地球物理方法在帷幕注浆治水中的探测分析

doi:10.11720/wtyht.2021.1146

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Abstract

Taking the Maoping mining area of Yilang in Yunnan Province as an example, the authors used the opposing coils transient electromagnetic method (OCTEM) and the audio-frequency magnetotelluric (AMT) method to detect the development of water-bearing fault zone within 700 m below the axis of curtain grouting project, with the intention to provide guidance for curtain grouting water control project. Through the comprehensive analysis of geophysical exploration, 7 anomalies with water-rich were delineated. The results show that OCTEM method can identify small water-bearing joints or cracks, AMT method is more sensitive to large-depth water-bearing fracture zone, and the combination of the two has obvious effect on the detection of bad water-bearing geological bodies. It can be seen that the application effect of integrated geophysical exploration in curtain grouting water control is good, the deep extension of water-bearing channel is effectively identified, and the target area is provided for curtain grouting water control.

Key words： opposing coils transient electromagnetic method audio-frequency magnetotelluric method curtain grouting water channel Maoping mining area

Received: 30 March 2020 Published: 01 March 2021

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	Articles by authors
	Hai-Min WEI
	Xing LI
	Bang-Tao SUN
	Sheng ZHOU
	Jie NIU

Cite this article:

Hai-Min WEI,Xing LI,Bang-Tao SUN, et al. Exploration and analysis of geophysical methods in curtain grouting water control[J]. Geophysical and Geochemical Exploration, 2021, 45(1): 245-251.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1146 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I1/245

Surface exposed strata and main lithology of the mining area

The formation,structure and location of geophysical survey line in the mining area

Statistics of physical parameters of rockspecimens in mining area

Sketch map of OCTEM

Flow chart of OCTEM data processing

Geophysical inversion and comprehensive anomaly analysis of 906 roadway vertical line

Geophysical inversion and comprehensive anomaly analysis of 906 roadway axis line

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