Abstract: The invention relates to a drive station for an underground plough system, in particular a coal plough system, with a machine frame to which a plough box can be fastened, and with a wedge trough which is connected to the machine frame and is provided with a plough guide device, which has chain channels for a plough chain, and also a plough end stop on a runout section for a winning plough. In order to facilitate the repair of a winning plough, the plough end stop is formed on an attachment which can be dismantled, when the plough guide device is mounted, to produce a repair section in the longwall-gallery transition of the wedge trough. The invention also relates to a repair method in which the plough end stop is dismantled and the winning plough is moved into the repair section.

Abstract: Chain guide arrangement for a mining machine, in particular for an extraction plough. The chain guide arrangement comprises a first chain passage for a load strand and a second chain passage for a return strand of a drive chain of the mining machine. At the end areas of the chain passages there are provided a drive station and a return station for the drive chain. At least at one of the chain passages a chain guide for the load strand and/or for the return strand of the drive chain is provided in a transition area to the drive station/s and/or the return station. According to the invention, the chain guide comprises a retaining pocket being open towards the drive chain and at an end face thereof being bounded by a hinge pin arranged to be transverse to a direction of movement of the chain. The chain guide further comprises a hold-down device comprising a pin seating on at least its one end face which pin seating matches with the hinge pin and is open on one side, and a locking arrangement.

Abstract: A plough guide for underground mining ploughs, with angle plates (5), whose extended arm (8) is fastened on the working face side to the conveyor pan (3) of a chain scraper conveyor and whose base arm (7) towards the face, supported on the ground (6), forms a sliding track for the plough, with upper and lower chain channel slides (11, 12) for the plough chains separated by distance pieces (9) fastened preferably at a distance from each other on extended arms of the angle plates, with a cover (15) closing the chain channels (12, 11) to the working face side and which can be pivoted towards the face, having at least one abutment part (21), which can be fixed on the plough guide and released, and with a guide rail (18) arranged on the plough guide at a distance from the sliding plough track. The abutment part (21) of the cover (15) is clamped between the angle plate (5) and a securing part (30) at a distance from the cover (15) screwed onto the angle plate (5).

Abstract: A plough guide for underground mining ploughs, with angle plates (5), whose extended arm (8) is fastened on the working face side to the conveyor pan (3) of a chain scraper conveyor and whose base arm (7) towards the face, supported on the ground (6), forms a sliding track for the plough, with upper and lower chain channel slides (11, 12) for the plough chains separated by distance pieces (9) fastened preferably at a distance from each other on extended arms of the angle plates, with a cover (15) closing the chain channels (12, 11) to the working face side and which can be pivoted towards the face, having at least one abutment part (21), which can be fixed on the plough guide and released, and with a guide rail (18) arranged on the plough guide at a distance from the sliding plough track. The abutment part (21) of the cover (15) is clamped between the angle plate (5) and a securing part (30) at a distance from the cover (15) screwed onto the angle plate (5).

Abstract: The control of a mineral mining machine having a hydraulic haulage motor senses the pressure of pressure fluid fed to the drive motor to apply brake mechanism when the sensed pressure is below a preselected value.