METHOD OF COMBINED DEVELOPMENT OF GOLD DEPOSITS FROM PLACER DEPOSITS AND TECHNOLOGICAL MINERAL FORMATIONS Russian patent published in 2019 - IPC E21B43/28 E21C41/00 

FIELD: mining.

SUBSTANCE: invention relates to the technology of development of gold-bearing placers and can be used in the development of natural placer deposits mainly with fine, fine and dispersed gold and man-made mineral formations. Method of combined development of gold deposits from alluvial and technogenic mineral formations includes the opening of the deposit with the subsequent advanced clearing recess of balance sands and the formation of workings with local extraction of gold-bearing mineral mass with a high content of valuable components, drilling injection wells between workings, supplying primary activated gold leaching solutions through them into the remaining low-producing formation, the production of productive solutions from them by standing in a low-productive formation, the collection of productive solutions through drainage, the subsequent extraction of gold to the sorbent. After the discovery of a deposit, gravitational processing of balance sands is carried out. After the first stage of gravitational processing part of the balance sands and the formation of workings tailings washing balance sands with fine fractions of underexploited fine and lamellar gold and the tails of placer gravitational processing are placed in a hydroinsulated central generation zone, along the perimeter of which a separating hydroinsulated dam with a drainage window of sorption cassettes is formed, which mates with a hydroinsulated section of the stock of the mother liquors. In parallel with the subsequent stage of gravitational processing of part of the balance sand, the solutions with active oxidizing agents for placer minerals are pumped into injection wells drilled to the low-productive formation bed, and then, after a technological pause, solutions containing gold leaching reagents. Productive solutions are collected from a low-productive formation through their drainage in the direction of the nearest workings to the intermediate zone located in front of the dividing hydro-insulated dam and having hydro-insulated bridges and a hydro-insulated bottom. After the accumulation of productive solutions above the level of the upper edge of the separating hydro-insulated dam, the supply of productive solutions to the hydro-insulated central production zone with leaching tails of washing balance sands and tails of placer gravitational treatment is carried out, passing through the drainage window of the sorption cassettes, the waterproofing section of the stock of the mother liquor to the external sorption columns associated with the capacity of the primary activated gold leaching solutions. Capacity of solutions with active oxidizing agents is associated with injection wells and a hydroinsulated central generation area.

EFFECT: increase technological and environmental efficiency of development.

1 cl, 2 dwg