FIELD: mining.
SUBSTANCE: invention relates to mining industry and may be used in development of thick steeply-dipping valuable ore bodies by the open-underground method. The method includes development of a pit to design depth with arrangement of the board to the limit position, mining of bottom and near-edge-zone reserves of ore with application of underground mines, transportation of broken ore in underground mines. Development of near-edge-zone reserves of the ore is carried out after extraction of bottom ones with a chamber system of development under protection of a combined rock-filling massif at the side of the pit space, besides, the rock-filling massif is formed as bottom up in layers, alternating filling of the waste rock and filling of the hardening filling mixture of the formed space between the dump and the board of the pit on each layer.
EFFECT: reduced losses and dilution in mining of near-edge-zone reserves of ore from overlying rocks.
3 cl, 1 dwg
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