• Coal Geology | Geoscience Australia

    Coal reserves are discovered through exploration Modern coal exploration typically involves extensive use of geophysical surveys, including 3D seismic surveys aimed at providing detailed information on the structures with the potential to affect longwall operations, and drilling to determine coal quality and thickness

  • (PDF) A Guide for Applying Geophysics to Coal Mining

    The Role of Geophysics (and this book) Coal mining companies need to overcome the traditional production related challenges of mining costeffectively and of extending the life of their mines

  • 预计阅读时间:9 分钟
  • Overview on the application of geophysics in coal

    Despite this favourable situation for geophysics, exploration for coal in many countries mainly relies on drilling The main reason for this is that when compared to petroleum exploration, coal exploration is concerned with much shallower targets (typically less than 2–300 m for open pit mining and less than about 1000 m for underground mining)

  • Cited by: 70
  • Coal mining Prospecting and exploration | Britannica

    Coal mining Coal mining Prospecting and exploration: The fundamental objective of coal prospecting is to discover coal resources through a search In areas where coal mining has not been previously practiced, the search process should result in obtaining coal samples that give reasonable evidence of the existence of a coal

  • Coal Exploration and Mining Geology

    Coal is a vital component of the world’s energy resources, and one that is expected to fill a significant role in meeting our energy needs well into the foreseeable future Geological science and associated technology are used to find and evaluate the coal resources that will be used to meet these needs, a process referred to as coal exploration,

  • 文件大小: 303KB
  • Circular 891 Geophysical Logs as a Source of Coal

    GEOPHYSICAL LOGS AS A SOURCE OF COAL BED DATA Geophysical well logs have been invaluable in the search for oil and gas because they provide rapid, economical, and detailed information on the thickness, lithologic characteristics, fluid content, correlation, structure, and depth of strata penetrated by a well

  • Coal | National Geographic Society

    Coal is a black or brownishblack sedimentary rock that can be burned for fuel and used to generate electricityIt is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning) Coal

  • 预计阅读时间:7 分钟
  • Keys to Successfully Using Geophysics to Detect Mine

    Keys to Successfully Using Geophysics to Detect Mine Voids and Covered Sinkholes Geotechnical, Geophysical, Geoenvironmental easily electricity flows through a material Geophysical Imaging of an Underground Coal Mine Geophysical Imaging of a Karst Sinkhole and Void Beneath Airport Runway

  • 文件大小: 1MB
  • Mine Void Detection through Electrical THG

    THG Geophysics Ltd 4280 Old William Penn Hwy Murrysville, PA 15668 Phone: 7243253996 Fax: 7247337901 [email protected]

  • Coal Geology | Geoscience Australia

    Coal reserves are discovered through exploration Modern coal exploration typically involves extensive use of geophysical surveys, including 3D seismic surveys aimed at providing detailed information on the structures with the potential to affect longwall operations, and drilling to determine coal quality and thickness

  • Overview on the application of geophysics in coal

    Geophysical logging reflects the physical and chemical properties of coal through the characteristics of acoustical, electrical, radioactive detections [2,8, 9] The geophysical logs of coals show

  • Identification of thinlayer coal texture using

    1 Introduction Coal texture refers to the deformation degree of coal under the action of tectonic stress, including deformed coal (or tectonic coal) and undeformed coal (Farmer and Pooley, 1967; Shepherd et al, 1981)Generally, wellpreserved depositional structures (eg, in situ cleats and band textures along the sedimentary bedding) are common in undeformed coal (Ju et al, 2008)

  • Coal Geology | Wiley Online Books

    Larry Thomas graduated from the University of Wales with a PhD in coalfield sedimentology, and has since been associated with the geology, exploration and mining of coal for over 40 years and has produced numerous technical papers, maps and reports on coal deposits worldwide He is a director of Dargo Associates Ltd, an international coal consultancy, involved in assessment of coal

  • Keys to Successfully Using Geophysics to Detect Mine

    5/5/2015 7 Electrical Resistivity is a measure of how easily electricity flows through a material Primary properties that affect the resistivity: Porosity: shape, size and interconnection of pores Water content Pore water salinity (electrolytes) Conductivity of minerals (clay mineral and metal content) Resistivity of mine voids will either be

  • GEOPHYSICS: Vol 56, No 1 SEG Library

    Density‐based reflectivity in seismic exploration for coal in Alberta, Canada To the Erratum in July 1990 GEOPHYSICS, p 948, to short note, “The point of PS mode‐converted reflection: An exact determination” by Gary G Taylor (GEOPHYSICS, 54, 1060–1063, August 1989)

  • GEOPHYSICS: Vol 85, No 6 SEG Library

    The November–December issue of GEOPHYSICS contains 71 papers, including case histories from Brazil, China, Sweden, and British Columbia Subscribe Recommend to a librarian Submit an article Front matter Solutions of PSV and SVP waves in singlewell imaging through reciprocity relations

  • USGS Mineral Resources OnLine Spatial Data

    Symbols indicating miningrelated features digitized from historical USGS topographic maps in the conterminous US Includes prospect pits, mine shafts and adits, quarries, openpit mines, tailings piles and ponds, gravel and borrow pits, and other features

  • Geophysical Methods & Applications

    surface geophysics and utility locating services and is dedicated to establishing strong client relationships SubSurface Survey’s extensive education and experience in implementing stateoftheart techniques allows for a more comprehensive approach to solving complex problems through

  • How Hard Is It to Find a Job in Geophysics? | Career

    The continued strong growth of the oil and gas exploration sector, as well as the coal and metals mining sector, has kept demand for skilled geophysicists high According to the US Energy Information Administration, total US private sector employment grew by around 1 percent from 2007 through the end of 2012, while jobs in the oil and gas

  • Identification of thinlayer coal texture using

    1 Introduction Coal texture refers to the deformation degree of coal under the action of tectonic stress, including deformed coal (or tectonic coal) and undeformed coal (Farmer and Pooley, 1967; Shepherd et al, 1981)Generally, wellpreserved depositional structures (eg, in situ cleats and band textures along the sedimentary bedding) are common in undeformed coal (Ju et al, 2008)

  • Coal Geology | Wiley Online Books

    Larry Thomas graduated from the University of Wales with a PhD in coalfield sedimentology, and has since been associated with the geology, exploration and mining of coal for over 40 years and has produced numerous technical papers, maps and reports on coal deposits worldwide He is a director of Dargo Associates Ltd, an international coal consultancy, involved in assessment of coal

  • GEOPHYSICS: Vol 56, No 1 SEG Library

    Density‐based reflectivity in seismic exploration for coal in Alberta, Canada To the Erratum in July 1990 GEOPHYSICS, p 948, to short note, “The point of PS mode‐converted reflection: An exact determination” by Gary G Taylor (GEOPHYSICS, 54, 1060–1063, August 1989)

  • Geomechanics and CO2 Sequestration Stanford University

    top of the coal, which reduced gas sweep efficiency and sequestration We also find that coal matrix swelling results in a very slight reduction in CO2 injectivity, but that hydraulically fracturing the coal close to its base mitigates the negative effect of permeability reduction on injection rate (Figure 3) Placement of a hydraulic fracture at

  • Radiometrics | Geoscience Australia

    The radiometric, or gammaray spectrometric method is a geophysical process used to estimate concentrations of the radioelements potassium, uranium and thorium by measuring the gammarays which the radioactive isotopes of these elements emit during radioactive decay

  • Geophysical Methods & Applications

    surface geophysics and utility locating services and is dedicated to establishing strong client relationships SubSurface Survey’s extensive education and experience in implementing stateoftheart techniques allows for a more comprehensive approach to solving complex problems through

  • USGS Mineral Resources OnLine Spatial Data

    Symbols indicating miningrelated features digitized from historical USGS topographic maps in the conterminous US Includes prospect pits, mine shafts and adits, quarries, openpit mines, tailings piles and ponds, gravel and borrow pits, and other features

  • How Hard Is It to Find a Job in Geophysics? | Career

    The continued strong growth of the oil and gas exploration sector, as well as the coal and metals mining sector, has kept demand for skilled geophysicists high According to the US Energy Information Administration, total US private sector employment grew by around 1 percent from 2007 through the end of 2012, while jobs in the oil and gas

  • GEOPHYSICS: Vol 85, No 6 SEG Library

    The November–December issue of GEOPHYSICS contains 71 papers, including case histories from Brazil, China, Sweden, and British Columbia Subscribe Recommend to a librarian Submit an article Front matter Solutions of PSV and SVP waves in singlewell imaging through reciprocity relations

  • Direct hydrocarbon indicators SEG Wiki

    Direct hydrocarbon indicators (DHIs) are an anomalous type of seismic amplitude that may occur due to the presence of hydrocarbons They occur due to a change in pore fluids, which cause a change in the bulk rock’s elastic properties

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