geophysical detection of water in coal mines

Geophysical detection of outbursts – Mining Science and

Detection of igneous intrusions Discontinuities in coal seams at the margins of dykes and other igneous intrusions can also be the sites of outbursts. Igneous intrusions can be investigated by geophysical surveys. Airborne and ground surface magnetic surveys are frequently conducted to loe dykes that might disrupt underground mining.

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Detection of underground voids in Ohio by use of

Geophysical methods are generally classified as electrical, potential field, and seismic methods. Each method type relies on contrasts of physical properties in the subsurface. Forward models based on the physical properties of air and waterfilled voids within common geologic materials indie that several geophysical methods are technically feasible for detection of subsurface voids in

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Review of Geophysical Exploration On Minedout Areas and

The accurate and effective detection of underground goafs and their water abundance is the key to ensure the safety of mine production. On the basis of the relevant research, this paper defines different goaf types from the perspective of geophysical exploration and discusses the geophysical prerequisites for goaf detection.

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Detection of Underground Voids in Ohio by Use of

Detection of Underground Voids in Ohio by Use of Geophysical Methods By Jens Munk and Rodney A. Sheets U.S. GEOLOGICAL SURVEY WaterResources Investigations Report 974221 Prepared in cooperation with the OHIO DEPARTMENT OF TRANSPORTATION and the U.S. DEPARTMENT OF TRANSPORTATION Columbus, Ohio 1997

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SURFACE GEOPHYSICAL METHODS FOR DETECTION OF

the electrical resistance. Mine voids in coal mines are usually encountered as resistivity 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

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GEOPHYSICAL MANUAL

Abandoned Mine Voids Detection Presentation Focus Geophysical Manual Part I Geophysical GEOPHYSICAL VOID DETECTION DEMONSTRATIONS Part III – Abandoned Mine Voids Detection *Sonar mapping can only be used in a borehole that has intersected a waterfilled void in the mine. Performance Evaluation of Geophysical Methods

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Detection and delineation of coal mine fire in Jharia coal

Sep 29, 2018 · Abstract. Coal mine fire is a serious problem in Jharia coal field, India. The coal mine fire can be detected with different techniques such as borehole temperature measurement, thermocompositional analysis, remote sensing techniques, thermographic measurement and geophysical

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Literature survey on the advance detection of dykes in

Literature survey on the advance detection of dykes in underground coal mine workings Prof. G A Fourie Laboratory for Advanced Engineering mining companies and the geophysical companies in terms of the needs of the one and the capabilities of the other. Clarke (1976 a,b) and Ziolkowski (1981)

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Geophysical characterization of derelict coalmine workings

Geophysical interpretations were then verified with subsequent geotechnical intrusive investigations. Comparisons of historical map records with intrusive geotechnical site investigations . show care must be taken using map data alone, as the latter mineshaft loions was found to be inaccurate. Geophysical characterization of derelict coalmine

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Geophysics For The Detection Of Abandoned Mine Workings

While there are several geophysical methods that have been demonstrated for the successful detection of abandoned mine workings, there is still no ''silver bullet'' to solve the problem in every case. The choice of geophysical method to detect abandoned mine workings should be made on a site specific, and sometimes target specific, level.

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Coal Mine Outburst – Mining Science and Technology

Coal Mine Outburst. Home / Archive by egory: Coal Mine Outburst. has been explored as a stress relief mechanism to prevent outbursts. The water pressure fractures the coal in advance of the face and provides for slow relaxation of stress through lateral movement enhanced by the presence of [] Read More Geophysical detection of

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Detection and delineation of coal mine fire in Jharia coal

Detection and delineation of coal mine fire in Jharia coal field, India using geophysical approach: A case study Rakesh Kumar Mishra1,PNSRoy2,3,4,*, Virendra Kumar Singh1 and Jai Krishna Pandey1 1CSIRCentral Institute of Mining and Fuel Research (CIMFR), Dhanbad, India.

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Characteristic of geological anomaly detected by combined

comprehensive information of geological anomaly, and the combined geophysical detection technology can get the optimum result. 2.1. Deep mine laneway exploration geophysical conditions For the comprehensive advanced detection in the mine laneway, it solves mainly the interface problems of coal and rock, rock fracture zone, and so on.

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FOR DETECTION OF UNDERGROUND MINE WORKINGS

Geophysical Technologies for Detecting Underground Coal Mine Voids, Lexington, KY, July 2830, 2003 5 In contrast to the coal, the modeling strongly defines the waterflooded mine openings. A problem with the interpretation of the voids is that it is difficult to determine the thick

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Detection of coal mine workings using highresolution

Under the sponsorship of the Bureau of Mines, a similar system was designed and constructed for use in the detection of coal mine workings. This report discusses the hardware and software aspects of the system and the appliion of the highresolution earth resistivity method to the survey and mapping of abandoned coal mine workings.

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Geophysical void detection at the site of an abandoned

OSTI.GOV Conference: Geophysical void detection at the site of an abandoned limestone quarry and underground mine in southwestern Pennsylvania. Geophysical void detection at the site of an abandoned limestone quarry and underground mine in southwestern Pennsylvania. Full Record

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4 summAry of coAl problems And possIble geophysIcs

of unexpectedly encountering intrusive bodies during future mining justifies the upfront detection efforts and associated costs. possible geophysical solutions – The benefit of wellplanned and executed airborne magnetic surveying has already been demonstrated to the coal mining industry.

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Detection of Cavity Using Electrical Resistivity

Geophysical survey for cavity detection is one of the most common near surface appliion. The usage of resistivity methods are also very straightforward for the air filled underground voids, which should have theoretically very high resistivity in the ERT image, whereas the water filled cavities have low resistivity in Electrical Resistivity Tomography (ERT) image.

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ENGINEERINGGEOPHYSICAL INVESTIGATION of ABANDONED COAL

ENGINEERINGGEOPHYSICAL INVESTIGATION of ABANDONED COAL MINES along Planned US69 PITTSBURG BYPASS PITTSBURG, KANSAS By: Jim Hild, Manager/Sr. Geophysicist Air/waterfilled voids Geophysical Mine Subsidence Investigation Void Detection and Mapping. Along EastWest TH169, Chisholm, Minnesota

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The appliion of geophysics in South African coal mining

embraced more readily by the coal mining industry, compared to a decade or two ago. Predictably, the growing interest in geophysical technologies has also created a need for eduion and training in the basic principles and appliion of geophysical methods, as local coal mining companies generally do not have inhouse geophysicists.

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Synergetic System for Water Body Detection in Coal Mine: A

In coal mining, a poorly sealed borehole is one of the channels that can lead to an inrush of water and quicksand movement, seriously compromising the safety of the coal mine. In this paper, we

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Synergetic System for Water Body Detection in Coal Mine: A

Aug 23, 2019 · Abstract. Detection of water yield property is one of the most important tasks for mine water control. Because of low reliability of a single water detection method, it is necessary to find an effective water detection system.

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Appliion of 3D Parallel Electrical Technology

Coal working face is damaged more and more seriously by water below the coal face floor. Therefore, floor water detection is a must in the process of extraction. This article aims to introducing appliion and principle of the twogateways parallel 3D electrical technology and the arrangement of the observation system. The authors use this method to detect the water under the floor of a mine

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Keys to Successfully Using Geophysics to Detect Mine

Keys to Successfully Using Geophysics to Detect Mine Voids and Covered Sinkholes Geotechnical, Geophysical, Geoenvironmental Geophysical Imaging of an Underground Coal Mine Geophysical Imaging of a Karst Sinkhole and Void Beneath Airport Runway. 2B2_G1543_Mine Void Detection_Brent Waters.pptx

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(PDF) Appliion of ground penetrating radar in

Finally, as an example, the characteristics of ground penetrating radar images are analyzed based on the detection results of No.015 water proof gate of Nanye coal mine.

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SurfacetoUnderground Transient Electromagnetic Detection

Abstract: Waterbearing 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.

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Overview on the appliion of geophysics in coal mining

To investigate further, interested readers are referred to [24, 25] on the appliion of geophysics techniques to coal mining, including the use of seismic reflection and electromagnetic

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(PDF) Surface Geophysical Methods for the Detection of

Surface Geophysical Methods for the Detection of Underground Mine Workings. Mine voids in coal mines are usually encountered as resistivity lows because of the presence of acidic mine water

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JOINT INVERSION OF SEISMIC AND GEOELECTRIC DATA

Chantelle A. Rebello, Sara J. Couperthwaite, Graeme J. Millar and Les A. Dawes, Understanding coal seam gas associated water, regulations and Dobróka In‐Mine Geoelectric Methods for Detection of Tectonic Disturbances disturbed coal seams and around a coal mine roadway, Geophysical

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Appliion of Grounded Electrical Source Airborne

Since goaf water can cause water inrush, collapse or other severe geological hazards in coal mining, its detection has become a significant issue. As the grounded electrical source airborne transient electromagnetic (GREATEM) system can provide considerable prospecting depth, lateral resolution, and high detection efficiency, the method may be

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Coal Mine Inclined Shaft Advanced Detection Method and

Coal, as one of the most abundant, widely distributed, and economically used energy sources in the world, takes an important position in the energy structure. Numerous mines are required in coal mining, and as a significant means to improve coal productivity in mining areas, inclined shaft development is adopted by most of the mines.

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Geophysics CCTEG Xi''an Research Institute Co. Ltd

Geophysics is one of the leading business with long history, covers mainly highly efficient investigation of coal resources, fine investigation of mining geological conditions, detection of the hidden disasterinducing factors, monitoring and early warning of mining dynamic hazard in coal mines, production and manufacturing of mining geophysical instruments, etc.

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