Patent ID: 6547336
Filing Date: 2003-04-15
Classification: E02F

Abstract:
A surface mining and testing system comprising:a small unit with an endless track chassis, an apparatus frame, a drive unit for driving the endless tracks, a milling roller arranged in front of said chassis with respect to a direction of travel, said milling roller being supported by said frame to rotate around a horizontal axis of rotation, substantially at right angles to the direction of travel, to operate with undershot, to be raised and lowered and to extend over an entire width of the apparatus, the milling roller including cutting tools, guide plates, ejection plates and a ring chute in functional connection with said milling roller; a large unit with a large unit endless track chassis, a large unit apparatus frame, a large unit drive for driving the a large unit endless tracks, a large unit milling roller arranged in front of said large unit chassis with respect to a direction of travel, said a large unit milling roller being supported by said a large unit frame to rotate around a horizontal axis of rotation, substantially at right angles to the direction of travel, to operate with undershot, the large unit milling roller including large unit cutting tools, an overall weight, drive output and throughput of the small unit being set relative to said large unit at a defined ratio, and a circumferential velocity of said cutting tools and a force acting on said cutting tool being substantially the same as a circumferential velocity of said large unit cutting tools and a force acting on said large unit cutting tools and a speed of rotation of said roller and a rate of feed can be varied continuously to optimize mining output.