Water Detection within the Working Face of an Underground Coal Mine Using 3D Electric Resistivity Tomography (ERT)

2019 ◽  
Vol 24 (3) ◽  
pp. 497-505 ◽  
Author(s):  
Weifu Gao ◽  
Longqing Shi ◽  
Peihe Zhai
Keyword(s):  
Electrical Resistivity Tomography ◽  
Electric Resistivity ◽  
Resistivity Tomography ◽  
Underground Coal Mine ◽  
Water Detection ◽  
Excess Water ◽  
Working Face ◽  
Underground Coal Mines ◽  
Safety Consideration ◽  
The Face

Controlling water in underground coal mines is an important safety consideration. There are very few methods that can detect or map water remotely within the working face of a mine. The two-dimensional (2D) electrical resistivity tomography (ERT) method is sufficient for detecting water directly above the roof and below the floor, but it fails to detect water within the internal blocks of the working face. Therefore, it is critical to develop a new acquisition methodology for mapping internally within the face given the limited space in which to work. In this paper, we apply the pole-pole array in an L-array around the working face using a modified roll-along method. The data are then inverted using commercial software. With our new methodology, abnormal areas that likely indicate excess water are delineated to provide guidance for the control of mine water.

scholarly journals Application of electric resistivity tomography for investigation of geological situation closed to railways

2019 ◽  
Vol 265 ◽  
pp. 03005
Author(s):  
Dmitriy Gorbach ◽  
Valeriya Yakimenko ◽  
Olga Konovalova
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Electric Resistivity ◽  
Practical Work ◽  
Surface Zone ◽  
Two Dimensional ◽  
Resistivity Tomography ◽  
Near Surface ◽  
Geological Situation ◽  
Engineering Geophysics

The paper reviews methods of engineering geophysics which can be applied to sections of railway tracks. The method of electrical resistivity tomography is used to study the properties of the geological situation under an engineering structure. In the course of practical work, two-dimensional geoelectric sections were obtained. Interpretation of the sections allowed to understand the structure of the near-surface zone.

scholarly journals Contribution of ERT on the Study of Ag-Pb-Zn, Fluorite, and Barite Deposits in Northeast Mexico

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 249
Author(s):  
José Alberto Batista-Rodríguez ◽  
Marco Antonio Pérez-Flores
Keyword(s):  
Structural Control ◽  
Electrical Resistivity Tomography ◽  
Electric Resistivity ◽  
Mineral Deposits ◽  
Mississippi Valley ◽  
Mining Activities ◽  
Resistivity Tomography ◽  
Made In ◽  
Wenner Array ◽  
Lower Resistivity

The results on the effectiveness of five 2D electrical resistivity tomography (ERT) survey profiles for Ag-Pb-Zn, fluorite, and barite exploration Mississippi Valley Type (MVT) and on the magmatic deposits of northeast Mexico, are presented. The profiles were made in areas with mining activities or mineralization outcrops. Schlumberger, dipole-dipole, and Wenner array configurations were used on the measurements. The results showed that electric resistivity can be used to distinguish between mineralized zones. In magmatic-type Pb-Zn and MVT Pb-Zn deposits, resistivity values are shown as low. In magmatic-type fluorite and MVT fluorite deposits, as well as the MVT barite deposit, low-resistivity values are related to Fe sulfides and clays. With these results it is possible to connect observed surface mineralization with underground mineralization. New mineralized zones are also found and their geometries, extensions, and dipping are reported. Therefore, lower resistivity values can be linked to mineral bodies with higher Ag-Pb-Zn contents, as well as bodies enriched in Fe sulfides, Fe oxides, and clays in the fluorite and barite mineralizations. In most ERT models, fractures and faults are identified, indicating a structural control on mineralization. From the geoelectric patterns we can infer the magmatic and MVT origin of these mineral deposits.

SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION

2020 ◽  
Vol 8 (4) ◽  
pp. 69-82
Author(s):  
D.S. Rakisheva ◽  
◽  
B.G. Mukanova ◽  
I.N. Modin ◽  
◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Water Level ◽  
Electrical Resistivity Tomography ◽  
Resistivity Tomography ◽  
Measuring Installation ◽  
Basic Functions ◽  
Tomography Method ◽  
Dam Monitoring ◽  
The Mathematical Model ◽  
Measurement Line

Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Numerical modeling is carried out for the following varied parameters: 1) water level at the headwater; 2) the height of the leak; 3) the depth of the leak; 4) position of the supply electrode; 5) water level and leaks positions are changing simultaneously. Modeling results are presented in the form of apparent resistivity curves, as it is customary in geophysical practice.

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