For a continuous miner (CM) panel, the following data are given.
Data related to CM
Dimension of a working face : 5.0 m (width) x 3.0 m (height)
Web depth m : 0.6
Time for one web cut up to full height, min : 9
Data related to shuttle car
Bucket capacity of shuttle car, tonne : 10
Fill factor : 0.9
Number of cars : 2
Cycle time of each car including loading, travel and unloading, min : 6
Assume, unit weight of coal is 1.4 tonne/m3 and its swell factor is 1.2. Consider, 6 working hours per shift.
The non-working time in min, in working hours per shuttle car to dispatch all coal cut by the CM, is____ (round off up to 2 decimals)