longwall face
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Longwall mining — is a form of underground coal mining where a long wall (typically about 250 400 m long) of coal is mined in a single slice (typically 1 2 m thick). The longwall panel (the block of coal that is being mined) is typically 3 4 km long and 250 400 m… … Wikipedia
Longwall mining — An automated form of underground coal mining characterized by high recovery and extraction rates, feasible only in relatively flat lying, thick, and uniform coalbeds. A high powered cutting machine is passed across the exposed face of coal,… … Energy terms
longwall — /lawng wawl , long /, adj. Mining. 1. noting or pertaining to a means of extracting coal or other minerals in an underground mine from a continuous face, the roof before the face being supported at intervals by temporary or movable artificial… … Useful english dictionary
longwall system — ˈ ̷ ̷ˌ ̷ ̷ noun Etymology: longwall from long (I) + wall : a method of coal mining in which the working face extends entirely across the seam, the work proceeds either away from or toward the main shaft, and the roof is allowed to cave in behind… … Useful english dictionary
longwall — /lawng wawl , long /, adj. Mining. 1. noting or pertaining to a means of extracting coal or other minerals in an underground mine from a continuous face, the roof before the face being supported at intervals by temporary or movable artificial… … Universalium
longwall mining — /lɒŋwɔl ˈmaɪnɪŋ/ (say longwawl muyning) noun the system by which coal is extracted from a long continuous face …
coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… … Universalium
mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… … Universalium
Лава (́выработка) — горная (a. longwall face; н. Streb; ф. taille; и. tajo, taller) традиционное pyc. название длинной очистной выработки, применяемой для подземной добычи угля. Термин Л. возник в нач. 19 в. c переходом в подземной угледобыче от узких… … Геологическая энциклопедия
Лава-этаж — (a. longwall face the length of which is equal to the full height of the level; н. Streb, dessen Lange der vollen Bauhohe entspricht; ф. taille d etage; и. tajo planta, taller planta) подземная очистная выработка c забоем, ориентированным … Геологическая энциклопедия
Лава-ярус — (a. longwall face the length of which is equal to the part of the level height; н. Streb, dessen Lange einem Teil der Bauhohe entspricht; ф. taille d etage; и. tajo piso, taller piso) подземная очистная выработка c забоем, ориентированным … Геологическая энциклопедия
