Patent ID: 7779984
Filing Date: 2010-08-24
Classification: E21C,E21D,E21F

Abstract:
1. An arrangement for extracting extraction products in underground mining in caving, in which the extraction product after caving in an extraction face can be removed through at least one extraction funnel being arranged in the bottom rock of the extraction face and open to an extraction path developed underneath the face, whereas the extraction path extends transversely between a conveyor path having an extraction conveyor for the extracted extraction product and an auxiliary path running parallel thereto, the arrangement comprising a loading ramp with a ramp surface essentially transverse to the direction of extraction of the extraction conveyor and inclined thereto, the extraction path being provided with a rail guidance, firmly arranged on a bottom surface which extends in the area between the auxiliary path and the conveyor path and on which the loading ramp is guided and along which it is movable by a displacement drive in the direction of the conveyor and in the opposite direction, wherein the displacement drive comprises a shifting cylinder device supported at the loading ramp and the rail guidance, and wherein the rail guidance has a number of connection points for the shifting cylinder device such that the shifting cylinder is selectively connectable to any one of the connection points.