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Following a conventional cut with a shearer to about 3 m (9.8 ft) the roof supports move forward and allow the caving of the top coal behind the roof supports a second conveyor mounted gob-side. This special LTCC method enables increased coal reserve recovery for only an incremental additional cost. This animation shows how it works. | Online Mining Exam
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Following a conventional cut with a shearer to about 3 m (9.8 ft) the ro…
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Thirty years ago today President Ronald Reagan stood in front of the Berlin Wall and gave one of the most historic speeches of his presidency. | Yahoo News
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