Operation
BWEs are used for continuous overburden removal in surface mining applications. They use their cutting wheels to strip away a section of earth (the working block) dictated by the size of the excavator. Through hoisting, the working block can include area both above and below the level of the machine (the bench level). By slewing, the excavator can reach through a horizontal range.
The overburden is then delivered to the discharge boom, which transfers the cut earth to another machine for transfer to a spreader. This may be a fixed belt conveyor system or a mobile conveyor with crawlers similar to those found on the BWE. Mobile conveyors permanently attached to the excavator takes the burden of directing the material off of the operator. The overburden can also be transferred directly to cross-pit Spreader, which reaches across the pit and scatters overburden at the dumping ground.
Read more about this topic: Bucket-wheel Excavator
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