FIELD: mining.
SUBSTANCE: method of block preparation and profiling of contiguous flat sylvinite layers by chambers includes a driving by combine complexes simultaneously to boundaries of the extraction block, driving of sectional developments only along the top layer, formation of block ventilating developments. The broken ore is supplied through ore pass wells from the top layer on the conveyor mounted on the lower layer. The block is profiled in the inverted order. Extraction drifts are pierced by ventilating passes. On the boundary of the extraction block the flank ventilating are formed then the block is profiled. Cleaning chambers of the lower layer are pierced among themselves at the boundary of the extraction block. The block conveyor is installed in the extraction drift of the lower layer and is increased during the driving. As the block is profiled the conveyor is shortened.
EFFECT: invention allows to reduce volumes and time of pre-mining works.
4 cl, 3 dwg
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