METHOD OF MINING BLIND OREBODIES UNDER PROTECTED OBJECTS Russian patent published in 2000 - IPC

FIELD: mining of orebodies located under surface protected objects. SUBSTANCE: method includes driving of transportation, drilling, stowing-ventilation and undercutting workings and stowing holes; ore breaking-out by horizons within extraction districts with leaving of barrier ore pillars and stowing of worked-out space of chambers with substandard ore containing useful component. In mining, parameters of extraction districts and barrier ore pillars are selected with due consideration of sizes of zones of tensile stresses in rock mass. Worked-out space of chamber is stowed with substandard ore flown from worked-out chambers on overlying horizon and hauled over stowing-ventilation workings. The substandard ore contains useful component in amounts higher than in mill tailings. Underlying horizons are extracted under protection of substandard ore by final stowing of hollows through stowing holes from overlying horizon to form technogenic deposit of substandard ore for its subsequent extraction. EFFECT: reduced impoverishment of ore and cost of stowing jobs. 3 cl, 8 dwg