Imaging Quaternary glacial deposits and basement topography using the transient electromagnetic method for modeling aquifer environments

Simard, Patrick Tremblay; Chesnaux, Romain; Rouleau, Alain; Cousineau, Pierre A.; Roy, Denis; Lambert, Mélanie; Poirier, Brigitte; Poignant-Molina, Léo

doi:10.1016/j.jappgeo.2015.05.006

Cited by 14 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elevation of the survey area sharply changes at Geophysical method especially Transient Electromagnetic (TEM) technique, as being non-invasive and cost-effective, acquisition of strong signals, deep levels of penetration, easy deployment, and suitability for geological exploration, which remains the first choice to explore the target with conductive characters. TEM has been widely used in various fields, such as engineering geology [20] and environmental geophysics investigations [21], mining [22], urban construction [23], tunnel prediction, and groundwater [24] and geothermal explorations. Due to its sensitivity to conductive geologic body when compared to the surrounding rocks with high resistivity, TEM has received great attention in the mined-out area with water investigations [25].…”

Section: Geologic Settingmentioning

confidence: 99%

Application of Transient Electromagnetic Method for Investigating the Water-Enriched Mined-Out Area

Liu

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

The water-enriched mined-out area, which led to frequent accidents and the serious destruction of ecological environment and serious threat to coal-mining practices. To ensure safe mining practices and to avoid the intrusion of water from the bases of coal deposits, the detection of the mined-out areas, especially the water-filled mined-out area in advanced, is one of the most important issues. This research focuses on detecting mined-out area enriched by water with the large-loop transient electromagnetic method. Data acquisition system was arranged along 23 survey lines, and the total of 1975 survey points were recorded. An inversion technique was used to interpret the TEM data. The inversion results suggested that the mined-out areas enriched by water always exhibit a very low-resistivity, the resistivity contour present closed circle sharp. There are three main water enriched mined-out areas, named JS1, JS2, and JS3 in the north part of the survey area, as well as three main water weak-enriched areas named RJS1, RJS2 and RJS3 in the west and southwest part of the survey area can be inferred by TEM, the interpretation results were verified by drilling. Large loop TEM is proved as an efficient way to investigate water enriched mined-out areas under the rugged topography conditions, and this work provides more detailed geological information to the coal mining enterprise for further coal-mining practices safety arrangement.

show abstract

Section: Geologic Settingmentioning

confidence: 99%

Application of Transient Electromagnetic Method for Investigating the Water-Enriched Mined-Out Area

Liu

et al. 2018

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The electrical prospecting methods, which are sensitive to low conductivity, simple in construction, and adaptable to a complex environment, have been widely used in coal mines. Among all the related methods, the direct‐current electrical method and the large fixed source loop of the transient electromagnetic method have been widely used and performed well (Hou et al, 2021; Rödder & Tezkan, 2013; Simard et al, 2015; Xue et al, 2012). However, the above‐mentioned detection methods also have some shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Fracture distribution in overburden strata induced by underground mining

Yao

Wang

Liu

et al. 2022

Deep Underground Science and Engineering

View full text Add to dashboard Cite

Coal-mining activities give rise to a series of ecological environmental problems, such as ground settlement and groundwater pollution. In fact, they are mainly caused by mining-induced fractures. Hence, it is necessary to study the mining-induced fracture distribution to identify the behavior of rock mass movement. However, the fractures in overburden strata cannot be directly measured owing to the special condition. Therefore, the majority of previous studies are based on experiments or experience. For this reason, this study first used a discrete element method to simulate the shape of mining-induced fractures in overburden strata. Then, a geophysical tool of transient electromagnetic method (TEM) was used to investigate the mining-induced fracture distribution. Based on the low-resistivity anomaly area, the water-rich area in overburden strata was analyzed to be mainly caused by fracture seepage. Through the mutual authentication between numerical simulation and TEM results, the mining-induced fractures in overburden strata were explored. This study can enhance the understanding of mining-induced fracture distribution on the one hand and guarantee the coal mining safety on the other, thus guiding the coordinated development between coal mining and environmental protection.

show abstract

“…The receiver of TEM instrument senses the secondary field. The data process system analyzes the electrical characteristics of the medium [5][6].…”

Section: The Time-domain Electromagnetic Methods Is Also Called Transimentioning

confidence: 99%

Input Power Factor Control of Matrix Converter Based Transmitter for Transient Electromagnetic Sounding

Li¹

2018

Preprint

View full text Add to dashboard Cite

Three-phase to single-phase matrix converter (TSMC) is used as the transmitter for transient electromagnetic method (TEM) instrument, instead of an AC-DC converter and an H-bridge inverter.The transmitter produces excitation current for primary field. The output current has a waveform with a bipolar square of half duty cycle, which is required by TEM. The space vector PWM based on input currents is discussed in detail. The control method of input power factor is proposed for TSMC. The simulation model of TSMC is established and the simulations of different conditions are completed.The simulation results show the controllability of the input power factor is illustrated.

show abstract

Imaging Quaternary glacial deposits and basement topography using the transient electromagnetic method for modeling aquifer environments

Cited by 14 publications

References 18 publications

Application of Transient Electromagnetic Method for Investigating the Water-Enriched Mined-Out Area

Application of Transient Electromagnetic Method for Investigating the Water-Enriched Mined-Out Area

Fracture distribution in overburden strata induced by underground mining

Input Power Factor Control of Matrix Converter Based Transmitter for Transient Electromagnetic Sounding

Contact Info

Product

Resources

About