longwall system

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 the workers

Useful english dictionary. 2012.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • 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 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 mining — /lɒŋwɔl ˈmaɪnɪŋ/ (say longwawl muyning) noun the system by which coal is extracted from a long continuous face …  

  • 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

  • Gundremmingen Nuclear Power Plant — Infobox NPP Picture = Gundremmingen Nuclear Power Plant.jpg Pic des = Unit A (left), Units B and C (right), cooling towers Country = Germany EIGENTÜMER = 75 % RWE 25 % E.ON Utility = Kernkraftwerk Gundremmingen GmbH Built = 1962 Start = April 12 …   Wikipedia

  • shortwall — /shawrt wawl /, adj. Mining. pertaining to a means of extracting coal when the working face is about a third the length of the longwall system and mining is done by a continuous cutter rather than by longwall machinery. [1910 15; SHORT + WALL] *… …   Universalium

  • shortwall — /shawrt wawl /, adj. Mining. pertaining to a means of extracting coal when the working face is about a third the length of the longwall system and mining is done by a continuous cutter rather than by longwall machinery. [1910 15; SHORT + WALL] …   Useful english dictionary

  • Frickley Colliery — Frickley South Elmsall Colliery was opened by the Carlton Main Colliery Company Ltd in 1903 in South Emsall, in Yorkshire, England.Frickley South Elmsall Colliery The first sod was cut on 23 April 1903 of shafts No.1 and No.2 and the Barnsley Bed …   Wikipedia

  • 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

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”