Extraction system for mineral extraction and retaining device for a sensor system therefor

An extraction system for mineral extraction, having a machine frame which is movable along a conveying device and which for each direction of travel, on its front side that, in operation, lies facing a working face, has hewing tools for the minerals to be won, and having a sensor system, disposed on the machine frame for mineral/host rock recognition, the extraction system having a retaining box for the sensor device, which retaining box is fastened in projecting arrangement to the front side of the machine frame, the retaining box housing the sensor system and having at least one of a downward and upward facing window opening, the at least one window opening being in one of a bottom wall and a top wall of the retaining box and which runs obliquely to a rear wall of the retaining box to enable the working face to be scanned by the sensor system at an angle relative to the rear wall.