FIELD: mineral extraction method with the use of underground hydraulic ore cutting and extraction of crushed ore through boreholes.
SUBSTANCE: method involves cutting deposit over the deposit area into panels (sections or blocks); drilling boreholes for extracting pulp; arranging standpipe for pressure working medium supply and standpipe for conveyance medium supply; forming working excavation and filling thereof with stowing after development; performing lower deposit undercutting to provide ore massif permeability for working medium by serial shock blasting borehole and then camouflet explosive charges; forming camouflet cavities by blasting borehole charges and intermediate camouflets; performing successive impregnating of crushed massif with medium dissolving borehole minerals (for instance with acid or alkali solution); arranging containers with the dissolving medium above camouflet explosive charges before blasting thereof; separating them from explosive charges and from upper borehole part by stowing; supplying working medium through pressure working medium pipeline without creating overpressure in the medium; increasing pressure at outlet with hydraulic intensifier; regulating ratio between solid and liquid components of pulp risen by means of airlift plant by supplying compressed air through actuator arranged under pulp intake means.
EFFECT: increased fullness of mineral extraction.
3 cl, 6 dwg
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Authors
Dates
2005-08-10—Published
2003-07-17—Filed