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longwall retreating mining

См. также в других словарях:

  • 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

  • Underground mining (soft rock) — refers to a group of underground mining techniques used to extract coal, oil shale and other minerals or geological materials from sedimentary ( soft ) rocks. Because deposits in sedimentary rocks are commonly layered and relatively less hard,… …   Wikipedia

  • Retreat mining — is a term used to reference the final phase of an underground mining technique known as room and pillar mining. This involves excavating a room or chamber while leaving behind pillars of material for support. This excavation is carried out in a… …   Wikipedia

  • Столбовые системы разработки —         (a. pillar mining, longwall retreating; н. Pfeilerbau, Strebbau als Ruckbau; ф. methode d exploitation par piliers longs, methode d exploitation par massifs, metode d exploitation par panneaux; и. sistema de exploration por paneles y… …   Геологическая энциклопедия

  • Crandall Canyon Mine — Coordinates: 39°27′36″N 111°10′04″W / 39.460000°N 111.167639°W / 39.460000; 111.167639 The Crandall Canyon Mine, formerly Genwal …   Wikipedia

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