FIELD: mining industry, possible use when extracting thick formations of mineral resources with heterogeneous hardness.
SUBSTANCE: method includes selecting working level on basis of surveying operations, drilling product wells, washing out and hydro-lifting of weak mineral resources of deposit from working level, collapsing and shrinkage of hard large-piece ores of deposit, collapsing of ceiling of resulting cavities. Working level is selected with consideration of given height of collapsing zone. Chambers and blocks are formed during wash-out of ores, blocks are extracted in accordance to plan of chambers. Shrunk large-piece ores are disintegrated and their hydro-extraction is performed with backfill of extracted space.
EFFECT: increased recovery of mineral resource.
6 dwg
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