METHOD OF HYDRAULIC BOREHOLE MINING OF MINERALS AND DEVICE FOR ITS EMBODIMENT Russian patent published in 2002 - IPC

FIELD: mining. SUBSTANCE: offered method is applicable in mining of hard minerals by hydraulic borehole mining and also in construction engineering for construction through boreholes of underground storages in sedimentary rocks of liquid and gaseous products, and burial of industrial wastes. Method includes tapping of producing bed by producing well; installation of casing string into well; lowering of coaxial suspended pipe string with jet nozzle and suction nose; supply into well of water and compressed air; the latter is supplied through one of suspended pipes to lower part of suction nose; washing of borehole mining chamber within interval of producing bed and intake of formed slurry through suction nose moving vertically without leaving fully the casing string. Device for realization of claimed method has suction nose accommodating jet nozzle. In this case, gap between suction nose and casing string amounts to 1-10 mm. EFFECT: higher efficiency of mineral hydraulic borehole mining and increased device operate reliability. 5 cl, 4 dwg