coal seams
Determination of Coal Seams Depth of Erosion with Respect to the Remnants of a Key Bed in Kerman Coal Field, Iran
... concealed coal seams by modern techniques, determination of the depth of erosion of coal seams with reference to the surface of angular unconformity underlying the remnants of a key bed is ...
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Study on the Protective Effect of Upper and Lower Coal Seams in the Protection Layer Mining of Middle Distance Coal Seam Group
... the coal seam of coefficient of variation and other auxiliary ...the coal seam were collected, comprehensive analysis of these test results, as the evaluation of protective layer mining gas control ...B8 ...
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The best available technologies for horizon mining of flat lying gaseous coal seams: Prospects for development in Russian mines
... of coal mining industry of ...Russian coal mines are ...of coal seams have been ...gaseous coal seams during longwall face mining is the improvement of methods and schemes of gas ...
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Analysis of the methods of calculating the main roof caving increment in mining shallow coal seams with long breaking faces
... shallow coal seams with long breaking ...Vorkuta coal deposit in the Pechora coal basin, Russia, actual main roof-caving increments and calculated values obtained with the use of the methods ...
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Contribution to Gas Production from Minor Coal Seams and Adjacent Shales: Numerical Modelling Results for the Mannville Coal Measures, South Central Alberta
... the coal seams is greater until ~5 months of production as a result of the higher recovery of gas from L2 and the upper seams, due to the shale ...produced coal gas increases over the ...
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Numerical Study on an Applicable Underground Mining Method for Soft Extra Thick Coal Seams in Thailand
... of coal seams, and weak mechanical properties of coal seams and the surrounding rock, the success possibility of underground mining and an applicable underground mining method is being ...
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Geophysical constraints on microbial biomass in subseafloor sediments and coal seams down to 2.5 km off Shimokita Peninsula, Japan
... in coal-bearing layers comprising highly permeable sandstone and coal formations with relatively large pore sizes, whereas very low cell concen- trations were observed in very low-permeability siltstone and ...
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Optimization of Longwall Panel Location with Regards to the Gradient of Coal Seams (TECHNICAL NOTE)
... A typical face with two entries (single entry) is assumed. The face line is also assumed to be perpendicular to the direction of the entries and therefore any rotation of the panel within the seam increases the gradient ...
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Report on the geological relations of some of the coal seams of Van Diemen's Land,—their probable extent, and relative economic value ; made to his Excellency Sir H E F Young
... them, and the succession to be regular, give a total thickness of carboniferous strata between the first-mentioned seam of coal and the Black River of nearly nineteen-hundred... Coal-Sea[r] ...
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Stratigraphic ranges of selected miospores in coal seams of Upper Coal Measures age in Oxfordshire and S.E. Warwickshire
... suggested that certain species had restricted ranges which could serve a useful stratigraphic purpose. The subsequent work on coals from the N.C.B. boreholes, involving the [r] ...
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3-Dimensional Modeling and Analysis of Mineable Seam of Khalashpir Coal Field, Rangpur, Bangladesh
... the coal bed deposits, basic structural shape, and the fault which is around 20 ...8 coal seams that ranges at a depth from 239 to 485 m below the surface with an average composite thickness is ...
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Assessment of Slope Stability in Opencast Coal Mines using Software
... main coal seams in the area, viz, Top seam, Middle seam and Bottom ...the seams in the above mines were extensively developed/depillared by ...of coal could be extracted which works out to 7 ...
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Notes regarding the existence of lower coal measures at Port Cygnet and Harefield
... It is clear, although, unfortunately, no important coal seams were met with, that the lower coal measures exist in this district below the Fenestella limestones and mudstones of Upper Pa[r] ...
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The palynology of the Ohai coalfield, Southland
... Couper {1964 pioneered a palynological-based biostratigraphic zonation scheme aimed at achieving broad correlation of coal seams in both the Beaumont Coal Measures of the Nightcaps Group[r] ...
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Spontaneous Combustibility Characterisation of the Chirimiri Coals, Koriya District, Chhatisgarh, India
... Representative coal samples were collected from different coal seams of the Chirimiri coalfield which cov- ered the entire stratigraphic ...of coal. The low rank coals found as younger ...
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Optimum Utilisation of Continuous Miner for Improving Production in Underground Coal Mines
... mining coal seams involves the driving of a series of narrow headings in the seam parallel to each other and connected by cross headings so as to form pillars for subsequent extraction, either partial or ...
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Geotimes - March 2003 - Storing Carbon in Earth.pdf
... how coal petrology affects the adsorption and release of ...resolved, coal will remain a somewhat uncertain sequestration ...about coal seams online later this ...
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An LCA study of an electricity coal supply chain
... in coal-burning ...in coal burning process, not from the perspective of coal lifecycle, because of the high consumption of coal and high levels of waste ...the coal-electricity ...of ...
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Study on each phase characteristics of the whole coal life cycle and their ecological risk assessment—a case of coal in China
... of coal exploitation and utilization in major coal producing countries of the world, the coal exploitation and utilization both contain coal mining, coal processing, and coal ...
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Adenine oxidation by pyrite-generated hydroxyl radicals
... in coal samples has been linked to the development of coal workers pneumoconiosis (CWP) in coal miners ...Similarly, coal samples that contain pyrite have been shown to cause nucleic acid ...
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