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Get Price: a continuous mining machine operator was in the red zone and was struck by the boom of the machine, knocking him against the coal rib. the miner was transported for medical evaluation and released that same day. the machine was equipped with a proximity system that was inoperable.
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Get Priceduring the seventeenth century 'bells pits' was the type of mining used. this consisted of bore holes being dug into the ground to search for coal.
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