Electrical Tomography Applied to the Detection of Subsurface Cavities

Martines-López, J.; Rey, J.; Dueñas, J; Hidalgo, Carmen Herrera; Benavente, J.

doi:10.4311/2011es0242

Cited by 30 publications

(17 citation statements)

References 26 publications

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“…The traditional ground resistivity methods are used to detect the water-bearing structures in mines, including electrical section method and high-density electrical method in a single tunnel (Maillol et al, 1999;van Schoor, 2005;Martínez-López et al, 2013;Martínez-Pagán et al, 2013). These methods belong to electrical sounding method, with which two-dimensional (2D) vertical geoelectrical information is acquired in a single tunnel to identify the water-bearing structures.…”

Section: Routine Detectionmentioning

confidence: 99%

Detecting and monitoring of water inrush in tunnels and coal mines using direct current resistivity method: A review

Liu

Nie

et al. 2015

Journal of Rock Mechanics and Geotechnical Engineering

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a b s t r a c tDetecting, real-time monitoring and early warning of underground water-bearing structures are critically important issues in prevention and mitigation of water inrush hazards in underground engineering. Direct current (DC) resistivity method is a widely used method for routine detection, advanced detection and real-time monitoring of water-bearing structures, due to its high sensitivity to groundwater. In this study, the DC resistivity method applied to underground engineering is reviewed and discussed, including the observation mode, multiple inversions, and real-time monitoring. It is shown that a priori information constrained inversion is desirable to reduce the non-uniqueness of inversion, with which the accuracy of detection can be significantly improved. The focused resistivity method is prospective for advanced detection; with this method, the flanking interference can be reduced and the detection distance is increased subsequently. The time-lapse resistivity inversion method is suitable for the regions with continuous conductivity changes, and it can be used to monitor water inrush in those regions. Based on above-mentioned features of various methods in terms of benefits and limitations, we propose a three-dimensional (3D) induced polarization method characterized with multi-electrode array, and introduce it into tunnels and mines combining with real-time monitoring with time-lapse inversion and cross-hole resistivity method. At last, the prospective applications of DC resistivity method are discussed as follows: (1) available advanced detection technology and instrument in tunnel excavated by tunnel boring machine (TBM), (2) high-resolution detection method in holes, (3) four-dimensional (4D) monitoring technology for water inrush sources, and (4) estimation of water volume in water-bearing structures.

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Section: Routine Detectionmentioning

confidence: 99%

Detecting and monitoring of water inrush in tunnels and coal mines using direct current resistivity method: A review

Liu

Nie

et al. 2015

Journal of Rock Mechanics and Geotechnical Engineering

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“…A total of 160 electrodes were used at the active landslide area, reaching a maximum depth of 55 m. The RES2DINV software package was used to assess the measurements made and the profile graphics present the results. This software package is based on the least-squares method using an enforced smoothness constraint, modified by a quasi-Newtonian optimisation technique (Martines-López et al 2013;Ekinci et al 2013;Drahor et al 2006).…”

Section: Electrical Resistivity Tomography (Ert) Profilesmentioning

confidence: 99%

Monitoring landslides with geophysical and geodetic observations

2015

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The objective of this study was to evaluate and predict land movement by integrating geodetic, geophysical and meteorological data in a landslide area. Specifically, electrical resistivity tomography surveying, Global Navigation Satellite System and terrestrial laser scanning techniques were integrated to monitor a landslide. The study area lies to the southeast of the town of Taşkent in southern Turkey, close to Balcılar in the Central Taurus mountain chain. Landslides result in considerable damage to structures, farmland and the environment in this area; therefore, it is important to characterise the size, extent and timing of past land movements in order to mitigate damage from future landslides. Analysis presented in this paper shows that the greatest land movements in the region occur in spring, when average motions can be up to 1.5 m per month. It is demonstrated that integrated techniques provide a better means for monitoring landslide processes and gathering data for predictions of future movements. Mapping landslide movements by integrating geophysical and geodetic observations can provide a meaningful evaluation of a landslide and its dynamics.

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“…; Leucci and De Giorgi ; Araffa ; Martínez‐López et al . ; Kasprzak and Sobczyk ). The flux of electrical charges through materials permits conductive materials like metal or electrolytes to be distinguished from insulating materials like air, ice, and plastics.…”

Section: Introductionmentioning

confidence: 98%

Integrated ground penetrating radar, electrical resistivity tomography and multichannel analysis of surface waves for detecting near‐surface caverns at Duqm area, Sultanate of Oman

Mohamed

El‐Hussain

Deif

et al. 2019

Near Surface Geophysics

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Caverns in hard limestone form natural karstic features. Surveying, detecting, and managing caverns are valuable as they provide an accurate and reliable understanding of the geohazards that caverns represent. With the construction of the highway network in Duqm (Duqm Port, Sultanate of Oman), near‐surface stability problem (caverns) appeared. Three geophysical tools – ground penetrating radar, electrical resistivity tomography, and multichannel analysis of surface waves – were utilized to delineate the subsurface cavities beneath an area of 10,000 m2 (200 m × 50 m). Based on interpretation of the results of two‐dimensional and three‐dimensional ground penetrating radar, electrical resistivity tomography and multichannel analysis of surface waves, the caverns are found to extend in the N–S direction. The results show two cavern systems of varying thicknesses. The caverns are separated at the top, but at some locations they become an one‐unit cavern system, especially in the northerly direction. The cavern system is not completely hollow; at some locations, they are filled with materials of different physical properties than the host rock. The depth of the cavern system varies between 0 and 5.2 m. The caverns are found only within the limestone rock unit. There is no evidence of caverns within the shale rock unit. The results from the three methods show good agreement in terms of depth and dimensions of the detected caverns.

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Electrical Tomography Applied to the Detection of Subsurface Cavities

Cited by 30 publications

References 26 publications

Detecting and monitoring of water inrush in tunnels and coal mines using direct current resistivity method: A review

Detecting and monitoring of water inrush in tunnels and coal mines using direct current resistivity method: A review

Monitoring landslides with geophysical and geodetic observations

Integrated ground penetrating radar, electrical resistivity tomography and multichannel analysis of surface waves for detecting near‐surface caverns at Duqm area, Sultanate of Oman

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