Detection of subsurface cavity due to old mine workings using electrical resistivity tomography: A case study

Bharti, Abhay Kumar; Singh, Krishna Kant; Ghosh, C.N.; Mishra, Krushna Gopal

doi:10.1007/s12040-021-01781-1

Cited by 16 publications

(7 citation statements)

References 32 publications

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“…In recent years, with the development of electrical exploration techniques and monitoring equipment, PEM technology, one of the direct current methods, had been widely applied and popularized in the evaluation of surrounding rock deformation and failure, groundwater seepage monitoring, grouting detection, and effect evaluation, water-rich abnormal area identification, etc. Compared with the other direct current methods, PEM has huge advantages of boasting faster data collection with parallel, efficient, and massive data collection and processing (Sun et al 2021;Bharti et al 2022).…”

Section: Pem Technologymentioning

confidence: 99%

Development process and height of the mining-induced water fractured zone over the longwall goaf

2023

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Providing accurate mining-induced water fractured zone over the longwall goaf prediction methods has become increasingly significant because of the grand economic and technological challenge for deeper extraction. Taking the No. 839 coalface in the Qingdong mining area, as a case study, a comprehensive study of the water-flowing fractured zone (WFFZ) formation process and peak height were carried out by the radial basis function (RBF) neural network model, parallel electrical monitoring (PEM) technology, numerical simulation model and the empirical formula method. The results show that the destruction does not occur simply layer-by-layer from the bottom up. Rather, the fractured areas appear first in soft layers above the goaf. With the advance of footage, the destruction gradually extends from soft layers to hard layers, and the WFFZ is formed when the fractured areas fit closely together. Also, the change process of the WFFZ shape is closely related to rock mass heterogeneity. In addition, the results of the comparison suggest that the RBF neural network model had more accuracy in predicting the height of the WFFZ than the numerical simulation model and empirical formula method.

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Section: Pem Technologymentioning

confidence: 99%

Development process and height of the mining-induced water fractured zone over the longwall goaf

2023

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“…Reconstructing signals has been widely discussed for decades in several domains such as image and video enhancement, audio denoising and so many others. Signals can be reconstructed from a reduced set of measurements ( [1][2][3][4][5][6][7]) ERT data are intensively used in mining [8][9][10] and related activities, water and soil quality assessment. So far they are processed using least-square minimization [9,11,12], or Convolutional neural networks for 3D reconstruction of ERT [13], or Kalman filtering, Bayesian Markov chain and Monte Carlo simulations for the TL-ERT data analysis and inversion.…”

Section: Introductionmentioning

confidence: 99%

Variogram models reconstruction for damaged ERT Profiles

Kabe,

Meying,

Mfenjou

2024

Preprint

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Reconstructing signals which are embedding spatial pattern such as Electrical resistivity tomography, is a process that should require to reconstruct first the spatial correlation of the damaged signals. This paper proposes an approach which implement an Unstationary Kriging (UNK) to reconstruct the experimental var-iogram of a damaged synthetic pseudo section within a set of pseudo sections coming from the same survey. We used and compare 02 other simple methods which are the Linear Regression (LR) and the Ordinary Kriging (OK), to test the hypothesis we formulate to link the experimental variograms coming from a same ERT survey. After an implementation of the hybrid process (UNK) on 02 sets of data which are synthetics, we observed that the LR and the UNK methods present an interest. They both reconstruct signals with a +90% rate of accuracy, but when there are no structure or spatial correlation within the data, the LR is unstable. In the end, we conclude on an evidence that is : the proposed hybrid process is a promising way to reconstruct variographic signals, since we can improve it after more time invested to dig deep into the modeling of each of his components.

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“…It is a nondestructive test, and the purpose of electrical surveys is to determine the subsurface resistivity distribution by making measurements on the ground surface and also characterize subsurface properties, i.e., structure, water content, or fluid composition [2]. This method is widely used in hydrogeological, environmental, and geotechnical research as it can potentially reveal the subsurface image [3][4][5][6][7][8][9][10]. This technique is used for the investigation of morphotectonic [11], weathering studies [12], landform evolution in mountain areas [13], permafrost detection [14], and exploration of underground karst structures [15].…”

Section: Introductionmentioning

confidence: 99%

“…That is why the ERT technique is now often used in landfills to inspect the moisture variation in the landfilled waste and the rate of waste degradation to have controlled leachate generation [25]. Apart from this, ERT technology is now vastly being used in geotechnical investigation [4][5][6][7][8][9][10]21,26]. To determine the unknown foundation depth, slope failure investigation, crack detection, the existence of sinkholes, foundation failure, moisture variation in pavement base materials, soil movement, etc., are broadly examined by the ERT method.…”

Section: Introductionmentioning

confidence: 99%

Application of Electrical Resistivity Tomography in Geotechnical and Geoenvironmental Engineering Aspect

Alam,

Ahmed,

Alam

2024

Geotechnics

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Electrical resistivity tomography (ERT) has turned out to be one of the most applied and user-friendly geophysical methods in geotechnical and geoenvironmental research. ERT is an emerging technology that is becoming popular nowadays for investigating subsurface conditions. Multiple attributes of the technology using various electrode configurations significantly reduce measurement time and are suitable for applications even in hardly accessible mountain areas. It is a noninvasive test for subsurface characterization and a very sensitive method used to determine geophysical properties, i.e., structural integrity, water content, fluid composition, etc. This paper aimed to elucidate the ERT technique’s main features and applications in geotechnical and geoenvironmental engineering through four case studies. The first case study investigated the possible flow paths and areas of moisture accumulation after leachate recirculation in a bioreactor landfill. The second case study attempted to determine the moisture variation along highway pavement. The third case study explored the slope failure investigation by ERT. The fourth case study demonstrated the efficiency of the ERT method in the landfill evapotranspiration (ET) cover to investigate moisture variation on a broader scale and performance monitoring. In all of the four cases, ERT exhibited promising performance.

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Detection of subsurface cavity due to old mine workings using electrical resistivity tomography: A case study

Cited by 16 publications

References 32 publications

Development process and height of the mining-induced water fractured zone over the longwall goaf

Development process and height of the mining-induced water fractured zone over the longwall goaf

Variogram models reconstruction for damaged ERT Profiles

Application of Electrical Resistivity Tomography in Geotechnical and Geoenvironmental Engineering Aspect

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