The long wall excavation method in mining is a highly efficient technique primarily used in coal mining, involving the full extraction of large rectangular coal blocks in a continuous operation. Using a long wall face, typically 100 to 300 meters long, hydraulic roof supports, or shields, hold up the mine roof while a shearer or plow cuts the coal. The coal is transported to the surface via a conveyor belt. As the shearer advances, the supports move forward, allowing controlled roof collapse, kn

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14 reactions | Cat longwall systems are operated in some of the world’s most productive underground mines. Running up to 98% of their production time in automation mode, they're setting production records in all regions, around the world. | Cat Mining | Facebook