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coal mining methods pdf book mb

coal mining methods pdf book mb

At its peak in 1920, 1.1 million people were employed in thecoal-miningindustry, with more than 1,300 mines across Britain producing nearly 300 million tonnes ofcoalfor domestic and industrial use.Miningwas, and remains, a dirty, dangerous and complex engineering task, extracting a raw material at depths of up to 1,400m below the surface, the shafts spreading out for further miles ...

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