Abstract: In a mining machine (1) designed for underground operation, for example for cutting coal seams, and being equipped with a removal conveyor means taking up the heap of debris in front of the mine face and transferring this heap of debris to a removal conveyor plant (18) arranged behind the mining machine (1), there is interpositioned, separately from the mining machine, between the mining machine (1) and the removal conveyor plant (18) a crushing aggregate (2) comprising its own travel drive and being movable on a chassis in particular being equipped it caterpillars (27). The crushing aggregate (2) comprises a receiving chute (11) provided on a frame (25), a conveyor (12) starting from this receiving chute and extending with its discharge end beyond said frame and at least one crusher roll (13) within the area between the receiving chute (11) and the discharge end (15) of the conveyor (12).

Abstract: In a device for conveying heaps of debris resulting when mining minerals or for conveying other lumpy material by means of a chain conveyor (1), belt conveyor or the like, in which device the conveyor is passed through a channel (5) having a width approximately corresponding to the width of the conveyor (1) and is guided before the channel (5), as seen in conveying direction (a), between inclined walls (7, 8) laterally extending beyond the width of the conveyor (1) and in which device there are arranged inclined deflection walls before the ingress location (6) into the channel, there exists the risk that blocks having too great a longitudinal size become jammed within the channel (5). For avoiding this risk, there is arranged an obliquely ascending deflection wall (11) in transverse direction relative to the conveying direction (a), said deflection wall including, as seen in a vertical plane extending in parallel relation to the conveying direction (a), with the plane of the conveyor (1) an angle (.alpha.