Nov 27, 2020 Water-bearing structures in front of coal mine shaft drivages require effective advanced prediction. Based on the characteristics of coal field logging curve carrying rich geological information, it is introduced into the advanced prediction of water-bearing bodies in mine shafts. At the same time, mine geophysical prospecting technology, such as the DC resistivity method, can accurately and ...
Geophysical logging reflects the physical and chemical properties of coal through the characteristics of acoustical, electrical, radioactive detections 2,8,9.
Detecting Underground Mine Voids Using Complex Geophysical . In July 2006, the National Energy Technology Laboratory in collaboration with Department of Geology and Planetary Science, University of Pittsburgh conducted complex ground geophysical surveys of an area known to
Which geophysical methods are best for mine void detection? ... -invasively measuring one or more physical properties of the earth. Geophysical surveys can be carried out on land, on water, on ice, from the air, and in boreholes. ... Geophysical Imaging of an Underground Coal Mine. 5/5/2015 9
Nov 13, 2019 The safety, efficiency, and green production of coal mines require more advanced geophysical detection technologies. In particular, the accurate detections of the locations of water-rich mined-out areas, as well as concealed water diversion channels, have become the main focuses of coal electrical methods in recent years.
At the end of the paper, a direction for the development of coal mined-out areas and their water abundance detection is put forward, including information fusion technology, ground-airborne electromagnetic methods, magnetic resonance sounding (MRS), surface-borehole transient electromagnetic method, surface-borehole seismic methods, and seismic while tunneling technology.
Mar 07, 2019 Water-bearing goaves are one of the main causes for water inrush accidents in Chinese coal mines. At present, both the surface and subsurface geophysical technologies cannot fully meet the technical requirements of high precision detection for coal mines safety development and production. Based on the surface-to-borehole electromagnetic method, we propose a surface-to-underground
Controlling water in underground coal mines is an important safety consideration. There are very few methods that can detect or map water remotely within the working face of a mine. The two-dimensional (2D) electrical resistivity tomography (ERT) method is sufficient for detecting water directly above the roof and below the floor, but it fails to detect water within the internal blocks of the working face.
Geophysical techniques provide the opportunity for remote assessment of the state of a rock mass and to remotely monitor changes in its behaviour. Geophysical techniques are widely used for these purposes in resource exploration and extraction. Because coal outbursts can be associated with geological structures and with zones of anomalous
water pollution control research series 14010 ehn 04/71 detection of abandoned underground coal mines by geophysical methods u.s. environmental. PROTECTION AGENCY ------- WATEK POLLUTION CONTROL RESEARCH SEIZES The Water Pollution Control Research Series describes the results and progress in the control and abatement of pollution in our Nations waters.
Nov 17, 2018 Therefore, this paper takes the typical case of water inrush in the workface number 1121 at Hongliu coal mine as an example, and studies the mechanism of water inrush through field drilling, geophysical detection, and numerical modeling.
DC resistivity method is one of the important geophysical methods, which is interpreted based on conductivity difference between rock and water. In recent years, this method is widely used for detection and real-time monitoring of water-bearing structures in tunnels and.
Two in-seam reflection surveys and one transmission survey were acquired at an abandoned underground mine near Hurley, Virginia, to demonstrate the feasibility of detecting abandoned-mine voids utilizing coal-seam seismic waves. Standard, commonly available tools for seismic reflection processing were used. The mine was detected and located by using trapped coal-seam seismic
Since their introduction to the coal mining industries of the United Kingdom and West Germany in the 1970s, geophysical methods are now utilised in coal mining around the world.
Jun 28, 2020 Allied geophysical laboratory science and research building 1 3507 cullen blvd, rm 312 houston, tx 77204-5007 united states. Building a 3d model of lithological contacts and near-mine structures in the kevitsa mining and exploration site, northern finland constraints from 2d and 3d reflection seismic data.
the electrical resistance. Mine voids in coal mines are usually encountered as resistiv-ity lows because of the presence of acidic mine water. Other Methods, such as magnetics and ground penetrating radar have been used for detecting subsurface cavities, but can be subject to precision, interference, or depth
In the aftermath of the Quecreek Mine inundation, MSHA received funding of $10 million dollars devoted to mine mapping and void detection. A portion of these funds was distributed to 13 states to improve mine mapping, referencing, and archiving. The remaining funds were used to sponsor void detection demonstration projects.
Water-bearing goaves are one of the main causes for water inrush accidents in Chinese coal mines. At present, both the surface and subsurface geophysical technologies cannot fully meet the ...
Nov 01, 2020 The study showed that the downhole TEM effectively solves the problem of detecting and locating water-filled tunnels in the vicinity of a borehole. This information is a valuable complement to the geophysical detection of abandoned coal mine tunnels.
Chang, J., Yu, J., and Su, B., 2017, Numerical simulation and application of mine TEM detection in a hidden water-bearing coal mine collapse column Journal of Environmental and Engineering Geophysics, 22, 223234. Abstract Google Scholar
Geophysical Technologies for Detecting Underground Coal Mine Voids Forum July 28-30, 2003 Lexington, Kentucky LOCATING AND CHARACTERIZING ABANDONED MINES USING MICROGRAVITY by Richard C. Benson1, Ronald D. Kaufmann1, Lynn Yuhr1, Richard Hopkins2 ABSTRACT Surface geophysical methods can be an important part of any site characterization effort.
Whole-space transient electromagnetic detection of water-bearing goaf CHEN Jian-Qiang 1, 2, 3 (), LI Yan-Chuan 3, TIAN Hao 3, LI Han-Chao 3 1. Mine Safety Technology Research Branch of China Coal Research Institute, Beijing 100013, China 2. State Key Laboratory of Coal Mining and Clean Utilization, China Coal Research Institute, Beijing 100013, China 3. . Jincheng Anthracite Mining Group ...
Geophysical detection of outbursts. ... methods can have a role in monitoring the effectiveness of gas drainage by virtue of the fact that water needs to be drained from coal before gas will flow. Undrained coal retains its moisture and electrically, wet coal is more conductive than dry coal. ... Many mines also conducted RIM surveys through ...
Jul 30, 2013 Since their introduction to the coal mining industries of the United Kingdom and West Germany in the 1970s, geophysical methods are now utilised in coal mining around the world. The range of applications in both surface and underground mining is extensive. Applications include coal seam mapping and geological fault detection, lithological ...
The advanced detection in mine roadway working face using geophysical methods requires an accurate detection of the geological anomaly, with a small detection space and strong interference.
Aug 08, 2019 Due to the influence of mining technology, some coal mines will leave mined-out areas (or goafs) in the rock mass after mining. If the distribution law and influence scope of mined-out areas cannot be accurately explored and controlled, it will bring great potential safety hazards to subsequent coal mining and cause serious harm to adjacent houses, roads, bridges, railways, and so on.
of shallow surface up to 130m. It distinguish the coal fire, air filled and water filled cavities, lithologies of Patherdih area. 7. Conclusions. The survey results suggest that electrical resistivity tomography is a state-of-the-art geophysical tool for the detection and interpreting of the and other mining voids subsurface cavities.
Ground Water Survey. ... (20 VES point) situated in 200m * 500m area. Visit Project. Void Detection in Coal Mines. 2D Electrical Resistivity Measurement along Two Longitudinal profiles of 350m length (each) upto a depth of 30m beside a Roadway near Asansol. ... Geophysical Gravity survey in the (Area 2500*300 sq m) prospect area of Manganese ...
Jan 01, 2011 Journal of China coal society20001 2Wu qiangLi zhouyaoMine flood disaster prevention and cureChina University of mining and technology press2002 Very strong water- rich area Strong water- rich area Medium water- rich area Less water- rich area praise water-filled aquifer of water yield property exactly ...
Feb 01, 2021 Study on the application of comprehensive geophysical prospecting technology for the goaf detection in coal mine. Fengge Chen 1, ... Yang M and Wang Y 2019 Application of high density resistivity method for water accumulated goaf detection in coal mine Mining Safety and Environmental Protection 46 90-94.
Sep 24, 2021 A coal mine in Datong is an integrated mine. At present, there is goaf in the upper and lower part of the mining coal seam. There is a lot of ponding in the goaf, which has great potential safety hazards for production. In order to find out the scope and location of ponding in goaf, the comprehensive geophysical exploration method combining transient electromagnetic method and high-density ...
Water-bearing goaves are one of the main causes for water inrush accidents in Chinese coal mines. At present, both the surface and subsurface geophysical technologies cannot fully meet the technical requirements of high precision detection for coal mines safety development and production. Based on the surface-to-borehole electromagnetic method, we propose a surface-to-underground transient ...
Aug 01, 2021 For all coal mine geophysical methods, DC resistivity is the best choice for detecting mine disaster water sources. Not only it can locate the distribution of low resistivity, but also it is free from metal interference in the coal mine tunnel.
High-density electrical method is a rapid, economical and efficient method for detecting goaf water in coal mines. In this paper, firstly, the high-density electrical method was used to perform forward and inverse calculations on the numerical model of the old mine goaf, and the characteristics of geoelectric response were analysed. It can provide scientific basis for on-site detection ...
Use of Geophysical Methods in Construction. Previous paper ... Related Downloaded 29 times. Geo-Denver 2000 Detection of Coal Mines Using Apparent Conductivity Robert L. Parsons, ... case study describes the use of apparent conductivity surveys to determine the location and extent of voids created by coal mining in the shallow subsurface. The ...
