Longwall mining
Longwall mining is a form of underground coal mining where a long single face of coal, known as a panel, is mined with a continuous cut across its entirety. Seams utilizing longwall panels are typically 4–20 ft (1.2–6.1 m) thick.
Longwall mining is a form of underground coal mining where a long single face of coal, known as a panel, is mined with a continuous cut across its entirety. Seams utilizing longwall panels are typically 4–20 ft (1.2–6.1 m) thick.
Longwall mining is a form of underground coal mining where a long single face of coal, known as a panel, is mined with a continuous cut across its entirety. Seams utilizing longwall panels are typically 4–20 ft (1.2–6.1 m) thick.
Source: Wikipedia "Longwall mining" · CC BY-SA 4.0
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