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.
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
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.
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
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
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
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
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)
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
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.
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
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.
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.
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
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.
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
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.
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.
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.
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.
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
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
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.
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
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
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.
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.