coal seam


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coal seam

[′kōl ‚sēm]
(geology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
'The team was told that there was intermittent fire flare from the exposed coal seams and this commenced around December 2017.
The pore structure was analyzed at 1000 times magnification to be able to analyze the low-permeability coal seam surface pore structure characteristics.
Based on the multiphysics field theory, the hydraulic-mechanical coupling model of gas extraction in the unloading coal seam was established, and the gas extraction process by drilling borehole in the floor roadway in the overburden of Panyi Coal Mine 1551 (1) panel was simulated.
[10] considered that with the increase of effective stress, the fracture opening of coal seam decreases gradually and some microfractures were completely closed, which made the permeability decrease sharply.
The thick and hard roof breaking has an important effect on the stability of surrounding rocks and coal seam [9, 10].
Coal seams mostly occur in the Lower Coal-bearing Member and the Upper Coal-bearing Member, being in the former present as thick coal seams (max 79.4 m) interlain with coarse sandstones, and in the latter as thin coal seams interlain with fine sandstones [16].
The first surface measurement of heights of surface points in the area of Block 7 was carried out on 15 March 2012 at the time of mining the first face 140 702 in coal seam 40.
The National Coal board believe it is unlikely to be a coal seam, and an Ordnance Survey map from the 1940s revealed the fire started where there used to be two large ponds that have been back-filled.
3 the black band at the bottom of the gas wells is the principal coal seam at Thar accounting for 80% of the total coal.
In Chinese coal measure strata, because the coal seam, dark mud shale, and tight sandstone interbedded deposit, the geological phenomenon which several kinds of coal measures gasses jointly preserve is relatively prevalent.
His peaceful life was disturbed shortly afterwards, however, when the Queensland Gas Company (QGC) arrived and informed him that they intended to drill a well on his property into a coal seam full of gas.