CUTTING HEAD OF SELECTIVE ACTION TUNNELING MACHINE Russian patent published in 1996 - IPC

FIELD: mining applicable in driving mine workings. SUBSTANCE: cutting head of selective action tunneling machine includes cutting bits located over its periphery, nozzles for supply of water to the zone of cutting and channels for supplying water to nozzles made in form of pipelines bent over the external contour of cutting head and located in its recesses and protected from mechanical damage by mounting pads rigidly secured to the cutting head. EFFECT: higher efficiency. 6 dwg