PROMISING TRENDS IN IN-SITU LEACHING IN GOLD PLACER MINES IN PERMAFROST REGION

The discussion focuses on replenishment of gold resources in the Far East of Russia by means of commercial use of frozen, deep-buried remaining blocks in earlier mined placer deposits in the north-eastern territory, which will allow resupplying the gold and foreign exchange reserves of the country. The article proposes a new combined eco-geotechnology for residual gold ore blocks and placer mining waste by way of two-stage development of each mine field within two years, with mining in winter and sand washing and in-situ heap leaching in summer. It is emphasized that this approach allows solving some ecological problems: removal of old waste dumps from ground surface, recovery of the former landscape and relief, closed cycle of solid geomaterials in waste, and rehabilitation of mining-damaged rock mass.

Keywords

Placer mine, gold production, secondary mining, leaching, permafrost region.

Issue number: 12
Year: 2018
ISBN:
UDK: 622:624.1
DOI: 10.25018/0236-1493-2018-12-0-177-184
Authors: Kiselev V. V., Kaimonov M. V., Popov V. I.

About authors: Kiselev V.V., Candidate of Technical Sciences, Senior Researcher, e-mail: gtf@igds.ysn.ru, Kaimonov M.V., Candidate of Technical Sciences, Senior Researcher, e-mail: gtf@igds.ysn.ru, Popov V.I., Candidate of Technical Sciences, Senior Researcher, e-mail: popov.gtf@mail.ru, Chersky Mining Institute of the North, Siberian Branch, Russian Academy of Sciences, 677000, Yakutsk, Russia.

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