METHOD OF MINING CONCRETIONS AND DEVICE FOR ITS EMBODIMENT Russian patent published in 2001 - IPC

FIELD: mining, particularly, methods and devices for mining of concretions from sea bottoms. SUBSTANCE: method includes delivery of perforated vessel from craft to bottom of water area, filling of vessel with concretions together with enclosing rock during forward and backward motions. Near bottom vessel is given reciprocating motion in vertical plane and lifted to craft. Method is embodied by device including craft, receiving appliance, winch, snatch blocks, head and tail pulling ropes, perforated vessel rectangular in cross-section with cutting edges. Vessel is connected with head and two tail ropes. head rope is kinematically connected with tail ropes by tie-rod located on longitudinal axis of vessel symmetry and hinged to free ends of large arms of angle levers secured to vessel bottoms by hinges. Other arms are made in the form of perforated flaps capable of overlapping of vessel. EFFECT: higher productivity and ecological safety of mining operations. 7 cl, 6 dwg