A Review of Electrical and Electromagnetic Methods for Coal Mine Exploration in China

Xue, Gang; Chen, Wen; Cheng, Jiulong; Liu, Shucai; Yu, Jiadong; Lei, Kangxin; Guo, Wenbo; Feng, Xihui

doi:10.1109/access.2019.2951774

Cited by 30 publications

(11 citation statements)

References 10 publications

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“…Moreover, the grounded wire source TEM has stronger signals in the late time, which is beneficial to deeper explorations. Considering the above features and the low-resistivity characteristic of the water-boring structures, the TEM method, especially with the grounded wire source, has quickly become the preferred method for detecting water-bearing bodies in many coal mines [8,22,38,71].…”

Section: Transient Electromagnetic Methodmentioning

confidence: 99%

“…This kind of water is generally referred to as mine (pit) water, among which the goaf water is typical. The goaf water refers to the groundwater preserved in the goaf areas or abandoned roadways of both ancient and modern coal mines due to long-term stoppages in drainage and actually can be seen as a source of usable groundwater [38].…”

Section: Primary Internal Water Sources Of the Coal-bearingmentioning

confidence: 99%

“…Meanwhile, the semiairborne TEM adopts ground emission and airborne receiving processes (Figure 14(b)), thus combining the larger transmitting power of ground TEM and higher detection efficiency of airborne TEM. For these reasons, it can collect an increased abundance of information and reflect the underground geological information more comprehensively, when compared with traditional electrical detection methods [38,80].…”

Section: Data Collectingmentioning

confidence: 99%

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Review and Challenges in the Geophysical Mapping of Coal Mine Water Structure

Chen

Zhang

et al. 2022

Geofluids

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Generally, the water-bearing structures of coal mines mainly include coal seam, roof, coal seam, floor, and goaf, while the main water-conducting structures include faults, collapsed columns, and collapsed goaf areas. The most commonly used methods for the detection of the above structures include the seismic method, high-density electrical method, controlled source audio-frequency magnetotelluric method, and transient electromagnetic method. Theoretically, the seismic methods have a higher resolution, which can be used to determine the targets’ geometry, but unable to determine whether the target is filled with water, while the electromagnetic methods are capable of this, although with lower resolution. Therefore, it is necessary to adopt the comprehensive geophysical prospecting in the actual field measurement of the coal mine water to guarantee the detection accuracy. Based on this, in the passage, first, we introduced the characteristics of the water-bearing and water-conducting structures and then analyzed the detection results of different methods by examples. Finally, we pointed out that, first, it is essential to develop the mine or airborne methods for the sake of convenience; and second, it is time that we adopt three-dimensional detection technology, multisource and multiresolution detection technology, and electromagnetic big data technology for high accuracy.

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Section: Transient Electromagnetic Methodmentioning

confidence: 99%

Section: Primary Internal Water Sources Of the Coal-bearingmentioning

confidence: 99%

Section: Data Collectingmentioning

confidence: 99%

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Review and Challenges in the Geophysical Mapping of Coal Mine Water Structure

Chen

Zhang

et al. 2022

Geofluids

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“…The geophysical exploration techniques that were used to detect the scope and water in goaf mainly included the 3-D seismic, GPR, radio-wave, channelwave seismic, Rayleigh-wave, TEM, DC, AMT, audio-frequency electrical penetration, laser-in-borehole, sonar-in-borehole, and TEM-in-borehole methods. However, different techniques of geophysical exploration led to differing results (Su BY et al 2016; Wang et al 2020;Xue et al 2013;Xue et al 2019; Yang et al 2017). According to these results, the position and volume of old goaf water were determined, conventional boreholes were used to drain old goaf water, the trajectory deviation of conventional boreholes was found to be large, and false appearance was rampant.…”

Section: Introductionmentioning

confidence: 99%

System for Prevention and Control of Old Goaf Water during Coal Mine Re-mining

Dong

2021

Preprint

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One integrated mine was currently threatened with an old goaf water disaster, therefore, the development of an advanced detection-guarantee system for roadway excavation with no blind area was imperative. Further, multiple geophysical exploration in combination with two types of boreholes were used to explore and drain water technology, with the anomalous geophysical area as the target area, The conventional borehole with the largest water outflow was taken as the target spot, at a low elevation of the mining area, and a remote directional borehole was used to drill into the old goaf along the stable rock strata below the coal seam floor to intercept the dynamic recharge water, which increased the efficiency of roadway excavation 4–9 times. The ‘isolated island’ old goaf water in the mining face was controlled through multiple geophysical exploration combined with the full-coverage exploration technology by conventional boreholes, and the water-rich anomalous area and geological anomalous area were determined, thus ensuring the safety of the mining face in terms of old goaf water. The technology for advanced short-distance exploration, advanced estimate, roadway exploration, and dynamic old goaf water with drainage was used to comprehensively guarantee real-time, safe mining. This system for the prevention and control of old goaf water was applied to a control project for the old goaf water disaster in the 101 mining face. At present, 1.37 Mt of coal has been safely mined from this mining face. The technical system has improved The Detailed Rules for Water Disaster Prevention and Control of Coal Mine (NCMSA 2018), and improved the technology for the prevention and control of old goaf water under conditions where the upper portion in the same coal seam was destroyed by a small-scale coal mine and re-mining.

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“…The detection depth of this method can reach approximately 2,000 m. Compared with traditional LOTEM methods, the short-offset grounded-wire TEM (SOTEM) method can produce a higher signal-to-noise ratio and achieve higher detection precision at shallow depth (<2,000 m). In recent years, many research achievements have been realized with this method, and excellent deep exploration results have been obtained in the fields of mineral deposits and hydrogeological prospecting (Chen, Xue, & Khan, 2016;Xue et al, 2013Xue et al, , 2020Xue, Chen, & Cheng, 2019;Zhou, Xue, Hou, Li, & Chen, 2017;Zhou, Xue, Hou, & Lu, 2018;Zhou, Xue, & Li, 2016).…”

mentioning

confidence: 99%

Exploration of lead‐zinc deposits using electromagnetic method: A case study in Fengtai ore deposits in Western China

et al. 2021

Self Cite

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The Fengtai Pb-Zn metallogenic deposits located in China's western region have good minerogenetic conditions and exploration potential. However, the Fengtai mining area passed through complex orogenic process zones, such as subduction, collision, and integration between the Yangtze Plate and the North China Plate. Existing geological research and drilling results showed that the ore bodies of large-scale Pb-Zn deposits in the ore-gathering area were steeply inclined, and the detection depths of the majority of the metal deposits were generally less than 300 m. Deep orecontrolling structures at approximately 500-1,000 m are not well understood. Therefore, high-precision and large-depth geophysical detection techniques are necessary to achieve the required accurate detection results. This study revealed that the resistivity values of the ore and host rocks were quite different, which is essential for effective and efficient geophysical prospecting. Based on the petrophysical result, the grounded-wire transient electromagnetic method system has been found to be one of the better choices for the deep prospecting of the metal deposits and was applied to detect Pb-Zn deposits in the Bafangshan-Erlihe area. First, the groundedwire transient electromagnetic method's effectiveness was verified using results from survey line 1 at a known ore deposit verified by the drilling result. Then, the technique was used to identify deposits in an unexplored area. A deep anticline and ore body were successfully imaged. Most lead-zinc ore bodies are controlled by the hinge and two wings of the tight anticline, and distributed in the contact zone between limestone and phyllite. The results provide a critical basis for deep prospecting and drilling design.

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A Review of Electrical and Electromagnetic Methods for Coal Mine Exploration in China

Cited by 30 publications

References 10 publications

Review and Challenges in the Geophysical Mapping of Coal Mine Water Structure

Review and Challenges in the Geophysical Mapping of Coal Mine Water Structure

System for Prevention and Control of Old Goaf Water during Coal Mine Re-mining

Exploration of lead‐zinc deposits using electromagnetic method: A case study in Fengtai ore deposits in Western China

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