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mining underground longwall

Mining Underground Longwall

2019-7-15 · Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–1.0 m thick). The longwall panel (the block of coal that is being mined) is typically 3–4 km long and 250–400 m wide. History. Plan of longwall mine before conveyors – the hoist is at the center of the central pillar.