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The Most Advanced Large Scale Coal Mining Machinery

Jan 01, 2013 7.2.1. Underground mining. Underground mining in turn is classified according to how access to the coal is accomplished. Thus, an underground mine can be a ‘drift’ mine, where access is bored horizontally from the surface to the deposit, such as the side of a mountain; a ‘slope’ mine where the shaft angles downward, usually following the downward slope of the deposit; and where a shaft ...

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