are in turn welded solidly to the exterior surface of the drum 110 the mechanical bits 105 can be routinely removed from this bit lug 107 and replaced as they wear the plumbing necessary to provide high pressure water at sufficient flows to water jets can take advantage of the bit spacing or lacing and the distance 117 between the smooth exterior surface of the drum 110 and the actual cutting diameter of the bits 105 water jets can be preferably mounted in two different ways as shown in fig6 a a first embodiment would involve the addition of a high pressure water hose not shown and metal piping 180 which is run from the miner body or the boom 120 and mounted tangent to the upper and lower surfaces of the drum 110 this piping 180 positioned within the effective cutting diameter 115 of the cutting head 110 can actually extend beyond the center line of the cylinder 110 so that the water jet nozzles 185 are only slightly back from the mechanical bits 105 in contact with the mineral seam not shown as illustrated in fig6 b a second embodiment would involve the addition of a high pressure water hose not shown and metal piping 180 which is run from the miner body or the boom 120 and may be curved or shaped to fit about the circumference of and just beyond the smooth exterior surface of the drum 110 the piping or conduits 180 are positioned within the effective cutting diameter 115 of the cutting head 110 and can be tapped and fitted with nozzles 185 which are located between the surface of the drum 110 and the cutting face 25 of the material being mined thus the distance between the coal.