ECOGEOTECHNOLOGICAL METHOD OF REPEATED UNDERGROUND DEVELOPMENT OF TECHNOGENIC GRAVEL DEPOSITS OF PERMAFROST ZONE Russian patent published in 2011 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: ecogeotechnological method of repeated underground development of technogenic gravel deposits of permafrost zone involves performance of stripping and mining operations during winter season. Pre-worked out area of earlier developed gravel borehole is reinforced with chain ice pillars erected parallel to those left during primary development of deposit. After that, development of technogenic pillar sands is performed. At that, in order to prevent caving in the ground surface, recovery of the relief and integrity of rock mass disturbed with mining operations, the whole worked-out area is filled with sand-and-stone material.

EFFECT: providing safety of mining operations, reducing volumes of dumps arranged on ground surface, preventing caving of ground surface within the limits of mine field, and recovery of relief and integrity of mine rock.

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