PNEUMATIC DISCHARGER

FIELD: mining industry. ^ SUBSTANCE: according to first variant, device has body fixed on base with tubular rod, on one end of which a piston is fixed, and on other end, projecting from the body, a head is mounted with means for holding perforator, compressed air distributor with channels, connected to forcing main, outlet main, rod hollow and pipe hollow, one end of which is rigidly held in head, and second one is positioned in axial channel of piston, while hollow of rod is connected to hollow of body through apertures. Pneumatic discharger is provided with protective cover for extending portion of rod, kinematically connected to body and to at least one assembly for preventing rod rotation, while protective cover by its upper end is rigidly held on extending end of rod below discharger and envelops outer surface of pneumatic discharger body along whole range of rod extension. According to second variant, body and protective cover are telescopic. Telescopic protective cover is made in form of outer cover, upper portion of which is held on rod below distributor, and at least one inner extending cover, upper portion of which is held on extending body mated thereto or on rod below place where extending body is fixed, and at least one assembly for preventing rod rotation for each couple of mated covers and inner cover with fixed body. Assembly for preventing rod rotation is made in form of a guide on outer surface of body along its axis or inner surface of body and corresponding recess on inner surface of body or inner surface of body, respectively. To decrease dust amount during forcing of processed compressed air into atmosphere and decreasing noise level device is additionally provided with at least one channel, connected to outlet main and made in upper end of protective cover for feeding compressed air processed with device into its hollow via extended rod, and at least one open channel, made on outer surface of body and/or inner surface of cover, and/or space, formed by bodies of cover and body, for forcing processed compressed air into atmosphere. Upper end of protective cover is made in form of bushing with inner ring-shaped channel for collecting processed compressed air, outputted into outlet main from hollows of working and/or idle drive of rod, while inner surface of bushing and rod on the side of body form a ring-shaped slit connected to ring-shaped channel, providing for direction of movement for processed compressed air from ring-shaped channe