FIELD: mining, particularly to mine thick deep-laying watered deposits of minerals liable to uncontrolled caving or of caved mineral, having non-uniform strength and including mineral containing heavy components.
SUBSTANCE: device comprises movable inner forcing column with water-jet nozzle connected to one end thereof, outer pulp distribution pipe with sliding lower part provided with inlet orifice. The sliding lower part is fixedly connected with movable inner forcing column. Movable inner forcing column is provided with telescopic shank having movement limiters, which provide distance from water-jet nozzle to inlet orifice within the following range: 
where L is distance between inlet orifice and water-jet nozzle, m; S is receiving orifice area, m2; k is coefficient equal to 2.4-4.5.
EFFECT: increased capacity.
1 dwg
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