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<p>Recently, the electrical resistivity tomography (ERT) technique has been increasingly applied to underground cavities filled with groundwater. To analyse the impact of underground water in the tunnels and its impact on the foundation of the structures, the electrical resistivity and Electromagnetic Survey are used to evaluate the near-surface structural and lithological features suitable for the detection of underground water in underground mine tunnels of Goldfields Ghana Limited at Akoon-Tarkwa. The data obtained were processed using the RES2Dinv software. The results from the Schlumberger configuration for traverse ‘A’ indicated the presence of overburden which had lower resistivity of about 100 Ωm. The low resistivity may be related to wet soils which forms the overburden. The IP model results added more meaning to resistivity by exhibiting low chargeability. The overburden had a depth of up to 10&#xa0;m. The second layer showed a region of higher resistivity. This was attributed to the presence of the underground tunnels because of the grouting used for supporting the roof. The results for traverse ‘B’ were quite high. The first region with the highest resistivity and is bounded by rectangular boundary. This high resistivity occurred at a depth of 100–174&#xa0;m, thus it had a width of 74&#xa0;m and can be interpreted to be concrete roofs and pillars in the underground tunnel. Water is noticed to be at depth of 50&#xa0;m, it is concluded that the impact the water will have on the foundations of structures in the area is minimal.</p>

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The use of electrical resistivity imaging and induced polarization surveys to investigate underground tunnels filled with water, case study—Akoon, Tarkwa-Ghana

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月4日

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  • Yamoa Munko-Abo,
  • Awudu Zakari

摘要

Recently, the electrical resistivity tomography (ERT) technique has been increasingly applied to underground cavities filled with groundwater. To analyse the impact of underground water in the tunnels and its impact on the foundation of the structures, the electrical resistivity and Electromagnetic Survey are used to evaluate the near-surface structural and lithological features suitable for the detection of underground water in underground mine tunnels of Goldfields Ghana Limited at Akoon-Tarkwa. The data obtained were processed using the RES2Dinv software. The results from the Schlumberger configuration for traverse ‘A’ indicated the presence of overburden which had lower resistivity of about 100 Ωm. The low resistivity may be related to wet soils which forms the overburden. The IP model results added more meaning to resistivity by exhibiting low chargeability. The overburden had a depth of up to 10 m. The second layer showed a region of higher resistivity. This was attributed to the presence of the underground tunnels because of the grouting used for supporting the roof. The results for traverse ‘B’ were quite high. The first region with the highest resistivity and is bounded by rectangular boundary. This high resistivity occurred at a depth of 100–174 m, thus it had a width of 74 m and can be interpreted to be concrete roofs and pillars in the underground tunnel. Water is noticed to be at depth of 50 m, it is concluded that the impact the water will have on the foundations of structures in the area is minimal.