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3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa Musa S. D. Manzi1, Raymond J. Durrheim2, Kim A. A. Hein1, and Nick King3 ABSTRACT Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines.
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3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa Musa S. D. Manzi1, Raymond J. Durrheim2, Kim A. A. Hein1, and Nick King3 ABSTRACT Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines.
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Jun 12, 2017018332Geophysical exploration can be effective in detecting and monitoring potential sources of coal mine water inrushes and underground watercourses. Generally, inmine seismic, DC resistivity, and transient electromagnetic methods are used for such purposes in China. However, such technologies can be influenced by many factors, such as roadways, fissures in the surrounding rocks, and various ...
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Water was injected to the ground through pipe 1 Fig. 3b to create a controlled water leakage located approximately at 23m depth. Time lapse mode was used for both methods. The geophysical monitoring mapping survey of the site was conducted for a period of two days in the beginning of summer of 2013.
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The geophysical study carried out in 2012 at Ocna Dej salt mine had as main objective the detailed illustration by means of ERT and VES resistivity data the actual extent of underground voids.
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Partsbased geophysical inversion with application to water flooding interface detection and geological facies detection. ... Zhangmines0052E10853.pdf 17.92Mb View full record ... One is related to the detection of the oilwater encroachment front during the water flooding of an oil reservoir. In this application, I propose a new 4D ...
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Jul 17, 2018018332The mining and processing of metal ores in the UK has left a legacy of environmental degradation, and abandoned metal mines still pose a significant threat to terrestrial and fluvial environments. Flow gauging, water quality and geophysics were combined in an integrated assessment of surface and subsurface hydrological contamination at Esgair Mwyn, an abandoned mine in …
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Potentialfield geophysical methods for fault detection. Gravity and magnetic methods are of great value in the detection of faults and fractures. In the mining industry, potentialfield methods are used for this purpose very commonly on a prospect scale. We encourage this nearuniversal mining experience to be used also in oil and gas development.
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GEOPHYSICAL DETECTION OF UNDERGROUND CAVITIES DRIADLEBEAU1 Lynda, PIWAKOWSKI2 Bogdan, STYLES3 Peter, BOURGEOIS4 Bernard, LATASTE5 JeanFran231ois, CONTRUCCI1 Isabelle 1Institut National de l’Environnement industriel et des RISques INERIS, Parc Saurupt, 54042 Nancy Cedex France lynda.driadlebeauineris.fr, Isabelle.Contrucciineris.fr …
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Other applications for monitoring soil water infiltration have been reported Hagrey et al., 1999, 2004 M252ller et al., 2003. Ring electrode array for imaging structure, decay, and fluids in trunks The ring array technique described earlier was applied to study the healthy state of various tree species, especially endangered olives Andria ...
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Colorado School of Mines 1500 Illinois St., Golden, CO 80401 3032733000 8004469488. Admissions amp Financial Aid Financial Aid Graduate Admissions
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GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL ENVIRONMENTAL INVESTIGATIONS by Donald B. Hoover, Douglas P. Klein, and David C. Campbell INTRODUCTION In the following discussion, the applicability of geophysical methods to geoenvironmental studies of ore deposits is …
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Electromagnetic techniques measure the electrical conductivity of the subsurface by inducing a current in the ground with a transmitter loop. They are used in groundwater exploration, detection of buried wastes, metal tanks and utilities, mapping of contaminant plumes, seepage from brine pits, salt water intrusions and archaeological survey.
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About the Authors Terry Young received his undergraduate education at Stanford University and then served as a pilot in the U.S. Navy. After earning his M.Sc. in Geophysical Engineering and his Ph.D. in Geophysics at Colorado School of Mines, Terry spent 18 years in geophysical research in industry, first at the French geophysical service company CGG and then at the oil company formerly ...
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Mercury release from the Rathburn Mine, Petray Mine, and Bear Valley saline springs, Colusa County, California 20042006. Summary of data obtained from field sampling of mine tailings and waste rock and water and sediment in regional springs and tributaries that drain from the mine area into Bear Creek.
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Mar 01, 2019018332The 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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An Applied Geophysical Detection and Subsequent Mitigation of ... underground mine manager was able to collect the water in buckets and was able to estimate water inflow rate at 7‐10 GPH Gallons Per ... et al. 1983, Rivers 1995, and Jordan and Hare 2002.
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Jun 19, 2014018332Combination of geophysical tools needed for studying saline water and fresh water problems and discussed in this short chapter are i joint resistivity and IP sounding, ii central frequency sounding CFS and dipole frequency sounding DFS, iii transient electromagnetic sounding, iv GPR, v remote sensing with GIS and GPS, vi high ...
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Jan 01, 2011018332High precision detection effect of waterinrushing structures inducing flooding of mine A water inrush occurred on 1 March 2010 in air return entry level 870 in floor of seam 16 in the 460 Depin Han et al. Procedia Earth and Planetary Science 3 2011 455 226€“ 462 front of excavation heading in Luotuoshan mine of Shenhua Wuhai Energy ...
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Potentialfield geophysical methods for fault detection. Gravity and magnetic methods are of great value in the detection of faults and fractures. In the mining industry, potentialfield methods are used for this purpose very commonly on a prospect scale. We encourage this nearuniversal mining experience to be used also in oil and gas development.
Get Quote
GEOPHYSICAL DETECTION OF UNDERGROUND CAVITIES DRIADLEBEAU1 Lynda, PIWAKOWSKI2 Bogdan, STYLES3 Peter, BOURGEOIS4 Bernard, LATASTE5 JeanFran231ois, CONTRUCCI1 Isabelle 1Institut National de l’Environnement industriel et des RISques INERIS, Parc Saurupt, 54042 Nancy Cedex France lynda.driadlebeauineris.fr, Isabelle.Contrucciineris.fr …
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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 locate dykes that might disrupt underground mining.
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zones. A combination of Hydrogeological, geophysical and geochemical investigations can be very effective in the detection of contaminant migration Sankaran et al. 2005. Detection of contamination due to mine seepage, oil field leakage and hazardous waste disposal were discussed by Warner 1969 Kelly 1976 Urish 1983 Mazac et al. 1987
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Resistivity Meter for Environment Detection, Several Cases about How to Use Geophysical Instruments for Environmental Pollution Exploration ... Water Reservoir leakage monitoring in China Learn more gt Rentals Page Learn more gt ... Mining and Groundwater Learn more gt About Us Company Profile Contact Us Product GD10 Imaging GD20 Imaging ...
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of salt water in fresh water, geotechnics detection of a fault in a granitic area, environment ... with geophysical methods Guerin et al., 2004. Resistivity methods offer a good opportunity for such ... In mining exploration, most of the orebodies appeared as conductive bodies and can be detected in
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This raised concern over the condition of 1500 m of the seam lying below the water line, which could not be examined by conventional methods. The mining company asked our geophysicists to conduct a geophysical survey to locate any leaks in the liner and, particularly, to evaluate the presence of possible failures in the suspect welded seam.
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DUAL SYSTEM LONG RANGE amp GEOPHYSICAL Water Detector. The first water detector in the world to detect ground water and artesian wells in the ground. The Geological system and longrange system for detection of groundwater and artesian wells. Fully …
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In the case of the marlpit mines, the corresponding geophysical anomalies could be correl ated to the exact position of the marlpit known according to the archive records. Drilling cam paign has confirmed a local collapse of the marlpit identified on the only High Resolution Seismic data. K. EYWORDS Cavities, detection, HRS, microgravity ...
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viscous than water see Table 2, they easily penetrate deep into the saturated zone and pond at low permeability barriers Kueper et al., 1993. As DNAPLs slowly dissolve in the saturated zone, they produce large plumes of contaminated ground water although 178 J.B. AjoFranklin et al. Journal of Applied Geophysics 59 2006 177–189
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Aug 01, 2015018332The traditional ground resistivity methods are used to detect the waterbearing structures in mines, including electrical section method and highdensity electrical method in a single tunnel Maillol et al., 1999, van Schoor, 2005, Mart237nezL243pez et al., 2013, Mart237nezPag225n et al., 2013.These methods belong to electrical sounding method, with which twodimensional 2D vertical ...
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Jul 30, 2013018332Unexpected strata collapses are also an issue in situations where towns and infrastructure have been built over old workings. Many of the mining fatalities that occur around the world are due to collapses and associated water inrushes. Unfortunately, the detection of voids by geophysical surveying is extremely difficult.
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articleosti21149664, title Geophysical Technologies to Image Old Mine Works, author Hanna, Kanaan and Pfeiffer, Jim, abstractNote ZapataEngineering, Blackhawk Division performed geophysical void detection demonstrations for the US Department of Labor Mine Safety and Health Administration MSHA. The objective was to advance current stateofpractices of geophysical …
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Washouts, mine workings, tunnels, and karstrelated cavities or sinkholes are excellent targets for microgravity surveys. Since gravity surveys are immune to many common electronic or acoustic noise sources, which can impede many geophysical techniques, they are particularly suited to highly developed or industrial sites.
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In the case of the marlpit mines, the corresponding geophysical anomalies could be correl ated to the exact position of the marlpit known according to the archive records. Drilling cam paign has confirmed a local collapse of the marlpit identified on the only High Resolution Seismic data. K. EYWORDS Cavities, detection, HRS, microgravity ...
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Detection of Abandoned Underground Coal Mines by Geophysical Methods Water pollution control research series Authors HRBSinger, Inc. Environmental Sciences Branch, Wilson Fisher Contributors United States. Environmental Protection Agency, Pennsylvania. Dept. of Environmental Resources Publisher U.S. Environmental Protection Agency, 1972 ...
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Mercury release from the Rathburn Mine, Petray Mine, and Bear Valley saline springs, Colusa County, California 20042006. Summary of data obtained from field sampling of mine tailings and waste rock and water and sediment in regional springs and tributaries that drain from the mine area into Bear Creek.
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The fungal or bacterial decay attacking heartwoods increases the moisture θ and ion content and reduces the density and lignin content.Wood stability measurements are used to isolate decay of higher ϵ r, σ, and α, and lower v values Skaar, 1988 Sakai et al., 1990 Schad et al., 1995 Ross et al., 1997, 1999 Simpson and TenWolde, 1999 Sandoz et al., 2000 Wang et al., 2000.
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Aug 28, 2014018332In contrast, NMR is widely used in geophysical applications to analyze porous rocks which carry a significant amount of petroleum, gas, and water. A variety of field applications in low fields including well logging Kenyon, 1992 and groundwater exploration Lehmann‐Horn et al., 2011 Grunewald and Walsh, 2013 are well known.
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GEOPHYSICAL DETECTION OF UNDERGROUND CAVITIES DRIADLEBEAU1 Lynda, PIWAKOWSKI2 Bogdan, STYLES3 Peter, BOURGEOIS4 Bernard, LATASTE5 JeanFran231ois, CONTRUCCI1 Isabelle 1Institut National de l’Environnement industriel et des RISques INERIS, Parc Saurupt, 54042 Nancy Cedex France lynda.driadlebeauineris.fr, Isabelle.Contrucciineris.fr …
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foundations, cellars and utility services Grandjean et al. 2000. This is due to both the comparatively highresolution data recorded from higher frequency 225 MHz nearsurface GPR systems and their relative ease of use. GPR has also been used successfully for mineshaft detection Kulessa et al. 2004.
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Detection of mines and explosive objects to address Naval doctrine in the marine environment, whether in the surf zone, nearshore region, or in deep water is also a continuing technical challenge. Additionally, the use of mines as effective defensive weapons and improvised explosive objects and homemade explosives as inexpensive terrorist ...
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SUBSURFACE GEOPHYSICAL DETECTION METHODS TO UNIQUELY LOCATE WATER ON MARS Gary R. Olhoeft, Department of Geophysics, Colorado School of Mines, Golden, CO 804011887 USA golhoeftmines.edu Introduction Water is involved in many geological and biological processes and has many unusual properties. The unique detection of water
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GeoTech is a new emerging establishment to fulfill geoscience services requirement by providing innovative services for geophysical, geotechnical, environmental, mining and ground water applications. It is established in 2013, to fillup unavailability of NDTGeophysical …
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geophysical detection of water in coal mines Research on Ground of Penetrating Radar in the Coal Mine 1Abstract—Although many geophysical techniques have been used to detect the disaster geological anomalous body in the Huaibei coal mine company there are still many mining disasters happening The main reason is that the coal seam is rich of water in Huaibei coal areas If the ground water
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3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa Musa S. D. Manzi1, Raymond J. Durrheim2, Kim A. A. Hein1, and Nick King3 ABSTRACT Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines.
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Water content Pore water salinity electrolytes Conductivity of minerals clay mineral and metal content Resistivity of mine voids will either be very high if airfilled or very low if filled with water or clayey sediment Measured in Ohms R VI Voltage V R Impedance I Modified After Culley et al. 1975 Electrical Resistivity
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A geophysical investigation of Jersey Valley geothermal field using magnetotelluric and gravity data Woodruff William F. PhD 2015 Multiscale properties of unconventional reservoir rocks Zhang Junwei PhD 2015 Partsbased geophysical inversion with application to water flooding interface detection and geological facies detection Zhou ...
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Jul 17, 2018018332The mining and processing of metal ores in the UK has left a legacy of environmental degradation, and abandoned metal mines still pose a significant threat to terrestrial and fluvial environments. Flow gauging, water quality and geophysics were combined in an integrated assessment of surface and subsurface hydrological contamination at Esgair Mwyn, an abandoned mine in …
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And the distribution of minedout areas and water accumulation in the coal mine are investigated in detail by using the comprehensive geophysical prospecting method of the transient electromagnetic method TEM and controlled source audiofrequency magnetotellurics CSAMT.
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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 limitations which restrict their use in mining applications.
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The geophysical study carried out in 2012 at Ocna Dej salt mine had as main objective the detailed illustration by means of ERT and VES resistivity data the actual extent of underground voids.
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Geophysical detection of underground cavities. ... complete methodology applied to the geophysic al detection of underground ... mine planning, abandonedmine detection and environmental ...
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Hydrogeologists use ground penetrating radar to determine the depth to water table and to predict potential pathways for subsurface flow. This data illustrates a well defined water table. Elevation data has been corrected using topography data in RADAN 7. Data was collected with the …
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3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa Musa S. D. Manzi1, Raymond J. Durrheim2, Kim A. A. Hein1, and Nick King3 ABSTRACT Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines.
Get Quote
Water was injected to the ground through pipe 1 Fig. 3b to create a controlled water leakage located approximately at 23m depth. Time lapse mode was used for both methods. The geophysical monitoring mapping survey of the site was conducted for a period of two days in the beginning of summer of 2013.
Get Quote
Geophysical MASINT is a branch of Measurement and Signature Intelligence MASINT that involves phenomena transmitted through the earth ground, water, atmosphere and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances.. According to the United States Department of Defense, MASINT is technically derived ...
Get Quote
Potentialfield geophysical methods for fault detection. Gravity and magnetic methods are of great value in the detection of faults and fractures. In the mining industry, potentialfield methods are used for this purpose very commonly on a prospect scale. We encourage this nearuniversal mining experience to be used also in oil and gas development.
Get Quote
In the case of the marlpit mines, the corresponding geophysical anomalies could be correl ated to the exact position of the marlpit known according to the archive records. Drilling cam paign has confirmed a local collapse of the marlpit identified on the only High Resolution Seismic data. K. EYWORDS Cavities, detection, HRS, microgravity ...
Get Quote
Partsbased geophysical inversion with application to water flooding interface detection and geological facies detection. ... Zhangmines0052E10853.pdf 17.92Mb View full record ... One is related to the detection of the oilwater encroachment front during the water flooding of an oil reservoir. In this application, I propose a new 4D ...
Get Quote
Jul 17, 2018018332The mining and processing of metal ores in the UK has left a legacy of environmental degradation, and abandoned metal mines still pose a significant threat to terrestrial and fluvial environments. Flow gauging, water quality and geophysics were combined in an integrated assessment of surface and subsurface hydrological contamination at Esgair Mwyn, an abandoned mine in …
Get Quote
GEOPHYSICAL DETECTION OF UNDERGROUND CAVITIES DRIADLEBEAU1 Lynda, PIWAKOWSKI2 Bogdan, STYLES3 Peter, BOURGEOIS4 Bernard, LATASTE5 JeanFran231ois, CONTRUCCI1 Isabelle 1Institut National de l’Environnement industriel et des RISques INERIS, Parc Saurupt, 54042 Nancy Cedex France lynda.driadlebeauineris.fr, Isabelle.Contrucciineris.fr …
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Other applications for monitoring soil water infiltration have been reported Hagrey et al., 1999, 2004 M252ller et al., 2003. Ring electrode array for imaging structure, decay, and fluids in trunks The ring array technique described earlier was applied to study the healthy state of various tree species, especially endangered olives Andria ...
Get Quote
Colorado School of Mines 1500 Illinois St., Golden, CO 80401 3032733000 8004469488. Admissions amp Financial Aid Financial Aid Graduate Admissions
Get Quote
Jun 12, 2017018332Geophysical exploration can be effective in detecting and monitoring potential sources of coal mine water inrushes and underground watercourses. Generally, inmine seismic, DC resistivity, and transient electromagnetic methods are used for such purposes in China. However, such technologies can be influenced by many factors, such as roadways, fissures in the surrounding rocks, and various ...
Get Quote
GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL ENVIRONMENTAL INVESTIGATIONS by Donald B. Hoover, Douglas P. Klein, and David C. Campbell INTRODUCTION In the following discussion, the applicability of geophysical methods to geoenvironmental studies of ore deposits is …
Get Quote
Electromagnetic techniques measure the electrical conductivity of the subsurface by inducing a current in the ground with a transmitter loop. They are used in groundwater exploration, detection of buried wastes, metal tanks and utilities, mapping of contaminant plumes, seepage from brine pits, salt water intrusions and archaeological survey.
Get Quote
Geophysical methods are indirect methods of investigation of subsurface structures through the acquisition and interpretation of instrumental data , therefore , characterized as noninvasive or nondestructive methods .This methodology allows to evaluate the local geological conditions through contrast of physical properties of the subsurface materials , eg conductivity or resistivity ...
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Mar 01, 2019018332The 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.
Get Quote
Jun 19, 2014018332Combination of geophysical tools needed for studying saline water and fresh water problems and discussed in this short chapter are i joint resistivity and IP sounding, ii central frequency sounding CFS and dipole frequency sounding DFS, iii transient electromagnetic sounding, iv GPR, v remote sensing with GIS and GPS, vi high ...
Get Quote
Jan 01, 2011018332High precision detection effect of waterinrushing structures inducing flooding of mine A water inrush occurred on 1 March 2010 in air return entry level 870 in floor of seam 16 in the 460 Depin Han et al. Procedia Earth and Planetary Science 3 2011 455 226€“ 462 front of excavation heading in Luotuoshan mine of Shenhua Wuhai Energy ...
Get Quote
ABSTRACT In closed hazardous waste i.e. industrial landfills, impermeable covers are used to seal in the waste so as to minimise water infiltration and the accumulation of leachate inside the waste. In this paper, we present a geophysical study performed on a French landfill where the cover was designed using impermeable clay and drainage sand layers along with a Geosynthetic Clay Liner ...
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In the case of the marlpit mines, the corresponding geophysical anomalies could be correl ated to the exact position of the marlpit known according to the archive records. Drilling cam paign has confirmed a local collapse of the marlpit identified on the only High Resolution Seismic data. K. EYWORDS Cavities, detection, HRS, microgravity ...
Get Quote
Geophysical detection of outbursts. ... One problem with radar systems is that if the water in the borehole is saline, strong borehole reverberations are generated and little energy is launched into the coal rock mass. Inseam boreholes also provide the opportunity for the deployment of geophysical logging tools that map the state of the coal ...
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Potentialfield geophysical methods for fault detection. Gravity and magnetic methods are of great value in the detection of faults and fractures. In the mining industry, potentialfield methods are used for this purpose very commonly on a prospect scale. We encourage this nearuniversal mining experience to be used also in oil and gas development.
Get Quote
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 locate dykes that might disrupt underground mining.
Get Quote
zones. A combination of Hydrogeological, geophysical and geochemical investigations can be very effective in the detection of contaminant migration Sankaran et al. 2005. Detection of contamination due to mine seepage, oil field leakage and hazardous waste disposal were discussed by Warner 1969 Kelly 1976 Urish 1983 Mazac et al. 1987
Get Quote
Geophysical MASINT is a branch of Measurement and Signature Intelligence MASINT that involves phenomena transmitted through the earth ground, water, atmosphere and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances.. According to the United States Department of Defense, MASINT is technically derived ...
Get Quote
GEOPHYSICAL DETECTION OF UNDERGROUND CAVITIES DRIADLEBEAU1 Lynda, PIWAKOWSKI2 Bogdan, STYLES3 Peter, BOURGEOIS4 Bernard, LATASTE5 JeanFran231ois, CONTRUCCI1 Isabelle 1Institut National de l’Environnement industriel et des RISques INERIS, Parc Saurupt, 54042 Nancy Cedex France lynda.driadlebeauineris.fr, Isabelle.Contrucciineris.fr …
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The ground water abstracting structures are man made which collect amp hold water for exploitation. The common ground water abstracting structures are Dug wells, Dug cum bore well, bore well, collector well amp Infiltration gallery. Wells are vertical shafts excavated or holes drilled in earth to the level of water …
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Resistivity Meter for Environment Detection, Several Cases about How to Use Geophysical Instruments for Environmental Pollution Exploration ... Water Reservoir leakage monitoring in China Learn more gt Rentals Page Learn more gt ... Mining and Groundwater Learn more gt About Us Company Profile Contact Us Product GD10 Imaging GD20 Imaging ...
Get Quote
DUAL SYSTEM LONG RANGE amp GEOPHYSICAL Water Detector. The first water detector in the world to detect ground water and artesian wells in the ground. The Geological system and longrange system for detection of groundwater and artesian wells. Fully …
Get Quote
Aug 01, 2015018332The traditional ground resistivity methods are used to detect the waterbearing structures in mines, including electrical section method and highdensity electrical method in a single tunnel Maillol et al., 1999, van Schoor, 2005, Mart237nezL243pez et al., 2013, Mart237nezPag225n et al., 2013.These methods belong to electrical sounding method, with which twodimensional 2D vertical ...
Get Quote
Washouts, mine workings, tunnels, and karstrelated cavities or sinkholes are excellent targets for microgravity surveys. Since gravity surveys are immune to many common electronic or acoustic noise sources, which can impede many geophysical techniques, they are particularly suited to highly developed or industrial sites.
Get Quote
Jul 30, 2013018332Unexpected strata collapses are also an issue in situations where towns and infrastructure have been built over old workings. Many of the mining fatalities that occur around the world are due to collapses and associated water inrushes. Unfortunately, the detection of voids by geophysical surveying is extremely difficult.
Get Quote
In the case of the marlpit mines, the corresponding geophysical anomalies could be correl ated to the exact position of the marlpit known according to the archive records. Drilling cam paign has confirmed a local collapse of the marlpit identified on the only High Resolution Seismic data. K. EYWORDS Cavities, detection, HRS, microgravity ...
Get Quote
Detection of Abandoned Underground Coal Mines by Geophysical Methods Water pollution control research series Authors HRBSinger, Inc. Environmental Sciences Branch, Wilson Fisher Contributors United States. Environmental Protection Agency, Pennsylvania. Dept. of Environmental Resources Publisher U.S. Environmental Protection Agency, 1972 ...
Get Quote
Detection of mines and explosive objects to address Naval doctrine in the marine environment, whether in the surf zone, nearshore region, or in deep water is also a continuing technical challenge. Additionally, the use of mines as effective defensive weapons and improvised explosive objects and homemade explosives as inexpensive terrorist ...
Get Quote
Mercury release from the Rathburn Mine, Petray Mine, and Bear Valley saline springs, Colusa County, California 20042006. Summary of data obtained from field sampling of mine tailings and waste rock and water and sediment in regional springs and tributaries that drain from the mine area into Bear Creek.
Get Quote
GEOPHYSICAL DETECTION OF UNDERGROUND CAVITIES DRIADLEBEAU1 Lynda, PIWAKOWSKI2 Bogdan, STYLES3 Peter, BOURGEOIS4 Bernard, LATASTE5 JeanFran231ois, CONTRUCCI1 Isabelle 1Institut National de l’Environnement industriel et des RISques INERIS, Parc Saurupt, 54042 Nancy Cedex France lynda.driadlebeauineris.fr, Isabelle.Contrucciineris.fr …
Get Quote
The fungal or bacterial decay attacking heartwoods increases the moisture θ and ion content and reduces the density and lignin content.Wood stability measurements are used to isolate decay of higher ϵ r, σ, and α, and lower v values Skaar, 1988 Sakai et al., 1990 Schad et al., 1995 Ross et al., 1997, 1999 Simpson and TenWolde, 1999 Sandoz et al., 2000 Wang et al., 2000.
Get Quote
Aug 28, 2014018332In contrast, NMR is widely used in geophysical applications to analyze porous rocks which carry a significant amount of petroleum, gas, and water. A variety of field applications in low fields including well logging Kenyon, 1992 and groundwater exploration Lehmann‐Horn et al., 2011 Grunewald and Walsh, 2013 are well known.
Get Quote
Borehole geophysics is used in groundwater and environmental investigations to obtain information on well construction, rock lithology and fractures, permeability and porosity, and water quality. The geophysical logging system consists of probes, cable and drawworks, power and processing modules, and data recording units. Stateoftheart ...
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Geophysical MASINT is a branch of Measurement and Signature Intelligence MASINT that involves phenomena transmitted through the earth ground, water, atmosphere and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and magnetic field or ionosphere disturbances.. According to the United States Department of Defense, MASINT is technically derived ...
Get Quote
zones. A combination of Hydrogeological, geophysical and geochemical investigations can be very effective in the detection of contaminant migration Sankaran et al. 2005. Detection of contamination due to mine seepage, oil field leakage and hazardous waste disposal were discussed by Warner 1969 Kelly 1976 Urish 1983 Mazac et al. 1987
Get Quote
foundations, cellars and utility services Grandjean et al. 2000. This is due to both the comparatively highresolution data recorded from higher frequency 225 MHz nearsurface GPR systems and their relative ease of use. GPR has also been used successfully for mineshaft detection Kulessa et al. 2004.
Get Quote
geophysical detection of water in coal mines Research on Ground of Penetrating Radar in the Coal Mine . 1Abstract—Although many geophysical techniques have been used to detect the disaster geological anomalous body in the Huaibei coal mine company there are still many mining disasters happening The main reason is that the coal seam is rich of water in Huaibei coal areas If the ground water
Get Quote
Water content Pore water salinity electrolytes Conductivity of minerals clay mineral and metal content Resistivity of mine voids will either be very high if airfilled or very low if filled with water or clayey sediment Measured in Ohms R VI Voltage V R Impedance I Modified After Culley et al. 1975 Electrical Resistivity
Get Quote
3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa Musa S. D. Manzi1, Raymond J. Durrheim2, Kim A. A. Hein1, and Nick King3 ABSTRACT Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines.
Get Quote
Compared with the borehole detection method, the geophysical method is widely used in detection because of its high efficiency and nondestructive characteristics 10–14. At present, there are many geophysical techniques. Each detection method has certain effect but also has limitations.
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Jul 17, 2018018332The mining and processing of metal ores in the UK has left a legacy of environmental degradation, and abandoned metal mines still pose a significant threat to terrestrial and fluvial environments. Flow gauging, water quality and geophysics were combined in an integrated assessment of surface and subsurface hydrological contamination at Esgair Mwyn, an abandoned mine in …
Get Quote
Symposium on Geotechnical Methods for Mine Mapping Verifications, Charleston, West Virginia, October 29, 2002 3 contrasts. Potentially applicable techniques include Gravity – The detection of mine workings with the gravity method is based on the measurement of minute changes in the earth’s gravity field caused by the lack of nearsurface
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The geophysical study carried out in 2012 at Ocna Dej salt mine had as main objective the detailed illustration by means of ERT and VES resistivity data the actual extent of underground voids.
Get Quote
In deep mine applications, GPR is invaluable for identifying geologic features that may be potential areas for rock bursts, such as fractures, shear zones and faults. This data illustrates a GPR scan of the roof in a salt mine and shows the variable thickness of salt in the roof structure. This data was collected with a SIR 30E and a 400 MHz ...
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Geophysical detection of underground cavities. ... complete methodology applied to the geophysic al detection of underground ... mine planning, abandonedmine detection and environmental ...
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Colorado School of Mines 1500 Illinois St., Golden, CO 80401 3032733000 8004469488. Admissions amp Financial Aid Financial Aid Graduate Admissions
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