Mining Methods and Machinery · Mining Methods · 2 marks · Numerical answer
A continuous miner loads two12-tonne shuttle cars. Their total cycles including loading are12 and15 min; loading each takes8 min. Find production in tonne/hour to two decimals.
After an8 min load, car I has4 min away from the miner and car II7 min. Each returns within the other car’s8 min loading window, so alternating the cars avoids miner waiting in steady operation. Loading controls output:12 tonnes per8 min, or90 tonnes/hour.
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