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 — /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
Mining — This article is about the extraction of geological materials from the Earth. For the municipality in Austria, see Mining, Austria. For the siege tactic, see Mining (military). For name of the Chinese emperor, see Daoguang Emperor. Simplified… … Wikipedia
Mining in South Africa — has been the main driving force behind the history and development of Africa s most advanced and richest economy. Large scale and profitable mining started with the discovery of a diamond on the banks of the Orange River in 1867 by Erasmus Jacobs … Wikipedia
Mining industry of South Africa — Premier Diamond Mine, Cullinan, Gauteng, South Africa Mining in South Africa has been the main driving force behind the history and development of Africa s most advanced and richest economy. Large scale and profitable mining started with the… … Wikipedia
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
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
