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Longwall Mining. Longwall mining is a highly productive underground coal mining technique. Longwall mining machines consist of multiple coal shearers mounted on a series of self-advancing hydraulic ceiling supports.

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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.

Shearer | mining | Britannica.com

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@article{osti_21176854, title = {Methodology for tomographic imaging ahead of mining using the shearer as a seismic source}, author = {King, A. and Luo, X.}, abstractNote = {Poor rock conditions in a coal long wall panel can result in roof collapse when a problematic zone is mined, significantly interrupting mine production.

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