Theoretically, replacing the existing conveyors with new, larger systems could solve the problem of volume-limited conveyor systems. Unfortunate!}', there are several reasons why the 'simple replacement' of such systems is sometimes impractical. First, the existing conveyor system may still be functioning perfectly, and this is likely to be the case since conveyors do not wear out nearly as rapidly as longwall shearing equipment. Secondly, the miles of tunnels, which have been carved throughout the mine, may not accommodate larger conveyor components and belt widths.
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