FIELD: mining of nonmetalliferous materials, such as sand, gravel, sapropel, and under water mining of solid minerals, for instance, concretions, etc. SUBSTANCE: the offered device has pipe column with nozzle having channel with tunnel-like section expanding towards the intake end of nozzle, shutoff mechanism installed in nozzle channel. Device drive is connected with pipe column for its reciprocation to provide for embedding of nozzle into rock for its forcing through nozzle column and shutoff mechanism. EFFECT: higher efficiency. 2 cl, 1 dwg
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