FIELD: mining industry.
SUBSTANCE: method includes contouring of extractive block by preparatory mines, extraction of block deposits by chambers with leaving of inter-chamber soft blocks. Prior to extraction of deposits drift is driven from preparatory mine and chambers are extracted by extraction combine from drift layer-wise, starting from lower sylvinite layer. Extracted sylvinite is sent to surface, and galit layer extracted later is used as backfill material in adjacent extracted chamber.
EFFECT: higher quality of extracted ore and higher reliability of ceiling control.
3 dwg
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