coalface technology

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Longwall mining — is a form of underground coal mining where a long wall (typically about 250 400 m long) of coal is mined in a single slice (typically 1 2 m thick). The longwall panel (the block of coal that is being mined) is typically 3 4 km long and 250 400 m… … Wikipedia
Coal in Australia — Australian Energy resources and major export ports … Wikipedia
Coal mining in Australia — Coal is mined in every state of Australia as well as the Northern Territory. It is used to generate electricity and is exported. 75% of the coal mined in Australia is exported, mostly to eastern Asia. In 2000/01, 258.5 million tonnes of coal was… … Wikipedia
face — face1 W1S1 [feıs] n ↑ear, ↑nose, ↑tooth, ↑eye ▬▬▬▬▬▬▬ 1¦(front of your head)¦ 2¦(expression)¦ 3 keep a straight face 4 pale faced/round faced etc 5 grim faced/serious faced etc … Dictionary of contemporary English

Словари и энциклопедии на Академике