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You decide which is best for you. Underground mining. ... Opencast mining, ... typically recovering a higher proportion of the coal deposits than underground mining. ...
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surface or ''opencast'' and underground mining. ... Geologists believe that underground coal deposits formed about 250–300 ... how to decide coal opencast vs underground;
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EFFECTS OF. STRIP MINING A ll ... he may decide to establish a permanent water impoundment in the last cut. ... An underground coal mine usually begins much like a ...
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