Patent ID: 6948779

Claim:
A mining member provided as a cutting roller for a continuously operating surface miner for mining mineral raw materials possessing solid and abrasive properties; the mining member comprising: a cylindrical or substantially cylindrical roller basic body for providing a cutting roller support; a drive for rotating said roller basic body; supports fastening said roller basic body to the surface miner; a roller jacket disposed around said roller basic body, said jacket having mini-disk bits arranged in rolling paths, and conveying screws having opposite pitches and extending from two edges of the roller to the middle of the roller to form two roller halves, which are symmetrical to one another providing a mineral raw material cutting roller for block cutting with a larger middle area forming a mining front joined on both sides by edge areas, the cutting roller rolling paths providing a circumferential interface with a middle cylinder joined on both sides by outwardly tapering frusta, said frusta having a length equal to at least 0.25 of a mining height (H Schn ), and said conveying screws on the roller halves being arranged symmetrically with respect to said circumferential interface, and said conveying screws on one of the roller halves being arranged offset in relation to said conveying screws on the other roller half by an amount and said mini-disk bits are provided either directly on or after sides of said conveying screws pointing to the middle of the cutting roller in the direction of rotation of the roller, wherein a driving wedge flank of each of said mini-disk bits are directed against each other in the middle cylinder wall area of the two roller halves and said mini-disk bit on both sides of said frusta is directed inwardly, and said mini-disk bits arranged at the two outer edges are free-cutting bits, which point toward the outside with their wedge flanks.