A continuous digging machine originally designed and used in large-scale
stripping and mining of brown coal deposits in eastern Germany. Its digging
mechanism is essentially a boom on which is mounted a rotating vertical wheel
having buckets on its periphery. As the rotating wheel is pressed into the
material to be dug, the buckets cut, gather, and discharge the material onto a
conveyor belt where it is moved to the mined materials transport system.
Dictionary of Mining, Mineral, and Related Terms