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Here are additional clues for each of the words in today's Mini Crossword. NYT Mini Across Hints 1 Across: "Vertically challenged" — HINT: It starts with the letter "S"
Bituminous coal is a particular rank of coal, as determined by the amount and type of carbon present in the coal and the amount of energy it can produce when burned. [2] It is higher in rank than sub-bituminous coal but lower in rank than anthracite. [3] Bituminous coal is the most abundant rank of coal. [3] [2]
A bell pit was a type of coal mine in which coal found close to the surface was extracted by sinking a shaft and removing coal from around it until the roof became unstable. It was then abandoned and left to subside. [5] Bind. A term used in various areas to refer to shale, mudstone, clay or sandstone overlying the seam. Bituminous coal
Smokeless coal is more efficient than a conventional open coal fire indoors because the high working temperature is released into the room as infrared radiation, as can be judged by the bright red color of a mature fire. The hot gases produced are lost up the chimney, thereby reducing efficiency just as in an open coal fire.
Coal refuse, also known as coal waste, rock, slag, coal tailings, waste material, rock bank, culm, boney, or gob, is the material left over from coal mining, usually as tailings piles or spoil tips. For every tonne of hard coal generated by mining, 400 kg (880 lb) of waste material remains, which includes some lost coal that is partially ...
UtahAmerican Energy, Inc. (formerly Andalex Resources), is a Bituminous coal underground coal mine and lignite surface mining company, headquartered in Sandy, Utah. UtahAmerican is a subsidiary of Cleveland, Ohio based Murray Energy Corporation.
Download as PDF; Printable version; In other projects Wikidata item; ... Sub-bituminous coal; Bituminous coal, or black coal This page was last edited on 1 March 2021 ...
Damp is the collective name given to all gases (other than air) found in coal mines in Great Britain and North America. [1]As well as firedamp, other damps include blackdamp (nonbreathable mixture of carbon dioxide, water vapour and other gases); whitedamp (carbon monoxide and other gases produced by combustion); poisonous, explosive stinkdamp (hydrogen sulfide), with its characteristic rotten ...