Detection and monitoring of water-filled voids using transient electromagnetic method: a case study in Shanxi, China

Xue, Gang; Cheng, Jiulong; Zhou, Nannan; Chen, W. Y.; Li, H.

doi:10.1007/s12665-013-2375-2

Cited by 41 publications

(15 citation statements)

References 11 publications

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“…The TEM survey revealed the distribution of the aquifers of the 8101 longwall face without mining influence and the water flow mechanisms during the mining process. The work confirmed that the TEM method can effectively detect the underground water distribution [10,[13][14][15]. At the same time, the TEM survey results also showed that the WFFZ could connect to the aquifer, and that the height of the WFFZ was over 97.25 m, which was 24-31 times the mining height.…”

Section: Discussionsupporting

confidence: 61%

“…However, no research on the measurement of the height of the WFFZ and water inrush mechanisms during the mining process has been reported. Because the transient electromagnetic (TEM) method is sensitive to low apparent resistivity areas, simple in construction and adaptable to complex geologic environments, it has been widely used to detect water enrichment areas in recent years [9][10][11][12][13]. The TEM method has been widely used due to its sensitivity to underground aquifers [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…The TEM method has been widely used due to its sensitivity to underground aquifers [14][15][16]. Xue et al [10] used the TEM method to detect a mined-out area and concluded that the water-filled voids were enlarging with time. Rödder et al [17] detected both sides of the Araba fault using the TEM method combined with 2D forward modeling, 3D forward modeling and data processing, and then analyzed the difference in resistivity on the two sides of the Araba fault.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Monitoring of the Water Flowing Fractured Zone during the Mining Process under a River

et al. 2018

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The hydrogeological conditions of coal mines in China are quite complex, and water inrush accidents occur frequently with disastrous consequences during coal extraction. Among them, the risk of coal mining under a river is the highest due to the high water transmissivity and lateral charge capacity of the unconfined aquifer under the river. The danger of mining under a river requires the accurate determination of the developmental mechanisms of the water flowing fractured zone (WFFZ) and the water flow mechanisms influenced by the specific geological conditions of a coal mine. This paper first used the transient electromagnetic (TEM) method to monitor the development of the WFFZ and the water flow mechanisms following the mining of a longwall face under a river. The TEM survey results showed that the middle Jurassic coarse sandstone aquifer and the Klzh unconfined aquifer were the main aquifers of the 8101 longwall panel, and the WFFZ reached the aquifers during the mining process. Due to the limited water reserves in the dry season, the downward flowing water mainly came from the lateral recharge in the aquifer. The water inrush mechanisms of the 8101 longwall panel in Selian No.1 Coal mine were analyzed based on the water flow mechanisms of the aquifer and the numerical simulation results. This provides theoretical and technical guidance to enact safety measures for mining beneath aquifers.

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Section: Discussionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic Monitoring of the Water Flowing Fractured Zone during the Mining Process under a River

et al. 2018

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“…The elevation of the survey area sharply changes at different sites. The highest point with an elevation of 1065.1 m is located at the top of the mountain in the north part of the survey area, and the lowest point with an elevation of 806.2 m is located in the valley of the southwest part of the survey area ( Figure 3) [12,26].…”

Section: Geologic Settingmentioning

confidence: 99%

“…Mined-out areas can be water filled, when water inrushes or surface water leaks through cracks into excavated areas, surface damage that is caused by subsequent subsidence might appear [11]. A typical collapsed area can be divided into three zones, such as Caving zone, Fault zone, and crooked zone, as shown in Figure 1 [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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

Liu

et al. 2018

Applied Sciences

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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.

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Appraisal of an Array TEM Method in Detecting a Mined-Out Area Beneath a Conductive Layer

Hai

Xue

Zhou

et al. 2015

Pure Appl. Geophys.

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Detection and monitoring of water-filled voids using transient electromagnetic method: a case study in Shanxi, China

Cited by 41 publications

References 11 publications

Dynamic Monitoring of the Water Flowing Fractured Zone during the Mining Process under a River

Dynamic Monitoring of the Water Flowing Fractured Zone during the Mining Process under a River

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

Appraisal of an Array TEM Method in Detecting a Mined-Out Area Beneath a Conductive Layer

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