Abstract: In a method for introducing and blowing rock dust to bind carbon dust during advance working or coal mining using an advance working or mining machine, respectively, the cutting tools are retracted relative to a displaceable machine frame after having cut an outbreak or excavation. During the displacement of the machine frame into a new outbreak or excavation position, rock dust is blown onto the roof and lateral-wall surfaces laid bare by the cutting tools, through nozzles arranged on the machine frame by the aid of pressure medium such as compressed air. The advance working or mining machine used to carry out this method includes a displaceable machine frame and a carriage movably mounted on the machine frame and carrying a pivotable cantilever arm on which cutting heads or rolls are rotationally mounted, and a loading device intended to receive cut or broken material.

Abstract: In a device for producing a gas-liquid mixture and, in particular, air-water mixture in the region of cutting tools, particularly chisels, arranged on at least one cutter head (10) rotationally mounted on a cutter arm (5) of a cutting machine (1), including at least one nozzle pair comprised of a nozzle (14) for ejecting a gas jet and a nozzle (13) for ejecting a liquid jet, wherein the axes (17, 18) of the nozzles (13, 14) of a nozzle pair are oriented in a manner that the jets impinge on each other at a distance from the outlet openings of the nozzles, the axes (17, 18) of the nozzles (13, 14) of a nozzle pair form an angle with each other of between 45 and 135°, preferably between 75 and 85°.

Abstract: A driving or mining machine includes a pivotable cantilever arm that is hinged so as to be pivotable in the height direction to a pivoting mechanism capable of being pivoted about a substantially vertical axis and on its free end carries rotationally mounted excavation tools, in particular cutter heads. It further includes a traveling mechanism and a frame carrying the traveling mechanism, on which frame a haulage device and a suction device as well as anchor boring and setting devices are arranged. The frame carrying the traveling mechanism on its side facing away from the cantilever arm behind the pivoting mechanism is designed as a lowered platform. The anchor boring and setting device is arranged substantially in the longitudinal center of the frame above the platform and pivotally mounted on a rollover whose pivot axis crosses the vertical axis of the pivoting mechanism.