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2. Coal blending - Wikipedia

   en.wikipedia.org/wiki/Coal_Blending

   Coal blending is the process of mixing coals after coal has been mined to achieve quality attributes that are desirable for the coal’s intended application (e.g. steam generation, coking). [1] The quality attributes that are most important in blending will differ from one mine site to another and also depend on how the coal seams vary in ...

3. Drift mining - Wikipedia

   en.wikipedia.org/wiki/Drift_mining

   Drift mining is either the mining of an ore deposit by underground methods, or the working of coal seams accessed by adits driven into the surface outcrop of the coal bed. [1] A drift mine is an underground mine in which the entry or access is above water level and generally on the slope of a hill, driven horizontally into the ore seam. [2]

4. Overburden - Wikipedia

   en.wikipedia.org/wiki/Overburden

   Overburden at a coal mining site. In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body.

5. Glossary of coal mining terminology - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_coal_mining...

   Small coal at one time referred to charcoal, but this usage is obsolete. [31] Snap or bait. Snap, bait or piece is food taken to eat part way through the shift and often carried in a snap tin. [32] Sough. A sough is a drainage tunnel to take water from coal mines without the need to pump it to the surface. [1] An example is the Great Haigh ...

6. Anthracite - Wikipedia

   en.wikipedia.org/wiki/Anthracite

   An anthracite pile in Trevorton, Pennsylvania. Anthracite derives from the Greek anthrakítēs (ἀνθρακίτης), literally "coal-like". [9] Other terms which refer to anthracite are black coal, hard coal, stone coal, [10] [11] dark coal, coffee coal, blind coal (in Scotland), [7] Kilkenny coal (in Ireland), [10] crow coal or craw coal, and black diamond.

7. Coal mining - Wikipedia

   en.wikipedia.org/wiki/Coal_mining

   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 ...

8. Mineral resource classification - Wikipedia

   en.wikipedia.org/wiki/Mineral_resource...

   There are several classification systems for the economic evaluation of mineral deposits worldwide. The most commonly used schemes base on the International Reporting Template, [1] developed by the CRIRSCO – Committee for Mineral Reserves International Reporting Standards, like the Australian Joint Ore Reserves Committee – JORC Code 2012, [2] the Pan-European Reserves & Resources Reporting ...

9. Coal analysis - Wikipedia

   en.wikipedia.org/wiki/Coal_analysis

   The rank of coal is correlated with its geologic history, as described in Hilt's law. In the ASTM system, any coal with more than 69% fixed carbon is classified by its content of carbon and volatiles. Coal with less than 69% fixed carbon is classified by its heating value. Volatiles and carbon are on a dry mineral free base; heating value is ...