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Continuous mining is just what it says continuous.
The continuous miner mines 40 feet, loading into a shuttle car. When a shuttle car is full it pulls out and an empty one pulls in and so on. When the Colmol mines its 40 ft., it then moves to the next place. By this time, the Colmol has dug 40 feet next door, so the units switch places, and so on and so forth through the whole shift.