A mining auger has a hollow auger shaft terminating in a front end, an auger helix welded to the outer face of the shaft and having a peripheral edge zone radially spaced from the shaft surface and extending helically thereabout; a plurality of spaced tool holders arranged in the peripheral edge zone of the helix for receiving cutting tool bits; separate spray nozzles arranged in the peripheral edge zone and associated with each cutting tool bit; a liquid supply channel provided in the shaft; a distributor channel communicating with the supply channel and following the helical course of the helix; and connecting channels leading to individual spray nozzles and communicating with the distributor channel. The distributor channel is situated at a substantial radial distance from the outer face of the auger shaft in the direction of the nozzles. There is further provided a bridging channel which extends radially away from the outer surface of the auger shaft and which is located externally of outer wall faces of the helix. The bridging channel connects the supply channel with the distributor channel.