FIELD: mining.
SUBSTANCE: dump of mine rock of technogenic gravel deposit includes small-grain dump formed in the worked-out area on a bedrock and pebble rock on the surface of small-grain dump. At that, along the perimeter of small-grain dump there formed is water-proof clay barrier. Besides, heat exchanger in the form of tubes oriented along dump longitudinal axis is arranged on the bedrock. Tubes are provided with the devices intended to supply the air to them and discharge the air from them. Vertical inspection wells equipped with casing pipes are made along the dump vertical axis. Top of dump is made in the form of a platform or a chute oriented along dump longitudinal axis.
EFFECT: higher gold extraction efficiency during re-development of gravel deposit.
4 cl, 3 dwg
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