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Coal mining - Wikipedia

As the longwall mining equipment moves forward, overlying rock that is no longer supported by coal is allowed to fall behind the operation in a controlled manner. The supports make possible high levels of production and safety .

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Coal Mining in Indonesia - Indonesian Coal Industry ,

An analysis of the coal mining sector in Indonesia. This section discusses the production, export and future perspectives of Indonesia's coal industry. en_gb .

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Coal Mining Equipment for Sale , Thin Seam Coal Mining .

Sany coal mining equipment is designed for both thin coal seam and midium-thickness coal seam.730C series thin seam coal mining machine is applicable for the mining needs of 0.8 ~ 2.2m coal seams and can be installed with 764 .

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Coal mining , World Coal Association

Over 7269 million tonnes (Mt) of hard coal are currently produced worldwide and 787 Mt of lignite. Coal is mined by two methods: surface or 'opencast' mining, and underground mining.

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Joy , Komatsu Mining Corp.