露天矿台阶对高密度电法勘探影响的实验研究

doi:10.11720/wtyht.2024.3503

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Abstract

The stability assessment of strip mine slopes is a fundamental means to prevent slope accidents. To investigate the influence of step topographies on the exploration using the high-density resistivity method on strip mine steps, this study conducted flume experiments for simulation using similar materials to explore the current field distribution in the profile to be surveyed. The experimental results show that: (1) The shallow positions near the upper and lower slope lines and the breadth line of the cleaning berm exhibited high current densities and even current distributions; (2) The middle positions manifested sharply changed current densities, with their contours akin to the step topography; (3) The deep positions displayed low current densities and tardy current changes; (4) A significant current gathering effect was observed near the slope bottom line on the profile; (5) Compared to flat topographies, step topographies exhibited high current densities and uneven current distributions. This suggests that in the exploration using the high-density resistivity method, step topographies in strip mines can cause abnormal inversion results for the middle positions and positions near the slope bottom line.

Key words： high-density resistivity method step topography stability assessment slope strip mine

Received: 08 September 2022 Published: 16 April 2024

ZTFLH:	P631.1
	TD15

Corresponding Authors: LI Peng-Hui E-mail: phyzzh@imust.edu.cn;xszylph1566@163.com

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	Zi-Hao ZHAO
	Peng-Hui LI
	Hai-Jian LYU
	Sen KANG

Cite this article:

Zi-Hao ZHAO,Peng-Hui LI,Hai-Jian LYU, et al. An experimental study on the influence of step topographies in strip mines on the exploration performed using the high-density resistivity method[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 565-572.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.3503 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/565

Realistic view of the slope of open pit mine

The elements of steps

Sink experimental device(a) and its diagram(b)

Power on position and section parameters of sink

Measuring points for wire fixing plate

Experimental table of boundary effect studies

Experimental results of boundary effect research

Topographical comparison experiment table

Measuring points for fixed wire plates in flat terrain

Three-dimensional and contour figure from plane topographic experiment

Experiments containing high resistance or low resistance strata

Comparison diagram of the experimental results of uniform strata and high-resistance strata

Comparison of experimental results of uniform and low resistance strata

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