FIELD: mining.
SUBSTANCE: method involves development and temporary workings, drilling of bore pits in the face of the mining slab, charging and explosion of bore pits, removal of crushed rock mass, hydraulic cleaning of the developed slab; bore pits are located in lower row at the distance of 2-3 diameters of the bore pit; every second one is charged with distributed charge; bore pits of each next row are oriented along one line in the ore deposit rise direction. Reduction of losses of crushed ore fine parts is achieved due to creation of chutes on bottom layer of ore deposit; at hydraulic cleaning of the extracted slab, movement of hydraulic mixture consisting of water and ore fine parts is performed along smooth surface of chutes.
EFFECT: improving development efficiency of ore bodies and reducing losses of enriched ore fine parts at hydraulic cleaning of extracted slab.
1 dwg
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SU1789025A3 |
