BOREHOLE HYDROMINING DEVICE Russian patent published in 2006 - IPC E21C45/00 

FIELD: mining, particularly to develop thick deep laying deposits of loose self-caving minerals or caved minerals with heavy mineral components.

SUBSTANCE: device comprises inner movable pressure column with water-jet head at column end, outer pulp delivery pipe with telescopic lower part having inlet orifice. Lower pressure column part is fixedly connected with telescopic lower part of pulp delivery pipe and may be telescopically slide relative column and provided with limiting-and-guiding rings. Pressure column may have telescopically sliding liner and limiting-and-guiding rings. Telescopic lower part of pulp delivery pipe has limiting-and-guiding rings and fastening members to connect thereof to lower part of pressure column.

EFFECT: reduced costs and labor inputs for mineral hydromining, increased efficiency of solid product production from well, simplified technological operations, increased efficiency of coarse material breakage, improved intensity of solid and liquid product mixing to deliver pulp having optimal density.

2 cl, 1 dwg