Illustrated Mining Terms


Hanging wall - the top or upper enclosing wall of a vein.  
Haulage - The horizontal transport of ore, coal, supplies, and waste. The vertical transport of the same is called hoisting.

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Haulageway - Any underground entry or passageway that is designed for transport of mined material, personnel, or equipment, usually by the installation of track or belt conveyor.

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Headframe - The structure surmounting the shaft which supports the hoist rope pulley, and often the hoist itself.

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Heading - A vein above a drift. An interior level or airway driven in a mine. In longwall workings, a narrow passage driven upward from a gangway in starting a working in order to give a loose end.

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Head section - A term used in both belt and chain conveyor work to designate that portion of the conveyor used for discharging material.  
Heaving - Applied to the rising of the bottom after removal of the coal; a sharp rise in the floor is called a "hogsback".  
Highwall – The unexcavated face of exposed overburden and coal in a surface mine or in a face or bank on the uphill side of a contour mine excavation.

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Highwall miner – A highwall mining system consists of a remotely controlled continuous miner which extracts coal and conveys it via augers, belt or chain conveyors to the outside. The cut is typically a rectangular, horizontal cut from a highwall bench, reaching depths of several hundred feet or deeper.

The highwall mining system, ready to launch. The launch vehicle weighs 350t, the continuous miner 70t and the addcars 12.6t each.

Hoist - A drum on which hoisting rope is wound in the engine house, as the cage or skip is raised in the hoisting shaft.

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Hoisting - The vertical transport coal or material.  
Horizon - In geology, any given definite position or interval in the stratigraphic column or the scheme of stratigraphic classification; generally used in a relative sense.
Hydraulic - Of or pertaining to fluids in motion. Hydraulic cement has a composition which permits it to set quickly under water. Hydraulic jacks lift through the force transmitted to the movable part of the jack by a liquid. Hydraulic control refers to the mechanical control of various parts of machines, such as coal cutters, loaders, etc., through the operation or action of hydraulic cylinders. SANDFILL1.JPG (33088 bytes)
Hydrocarbon – A family of chemical compounds containing carbon and hydrogen atoms in various combinations, found especially in fossil fuels.  

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