METHOD FOR DEVELOPMENT OF COMPLEX-STRUCTURE GOLD-BEARING PLACERS WITH SELECTIVE EXTRACTION AND SEPARATE PROCESSING OF SANDS Russian patent published in 2025 - IPC E21C41/30 E21B43/28 

FIELD: mining.

SUBSTANCE: invention relates to mining and can be used in development of complex-structured placers. Method for development of complex-structure gold-bearing placers containing poor sands and balance sands consisting of rich and ordinary sands includes opening of placer, selective extraction and separate gravitational processing of balance sands, leaching of poor sands and tailings of gravity processing of balance sands containing mainly fine and plate-like gold. In case of extraction prior to opening during the first stage of operational exploration and during opening of zones of rich sands, the second stage of operational exploration with local thickening of wells network is carried out to specify contours of zones of rich sands. Zones of rich, ordinary and poor sands are delineated. Scraper-doser bucket performs extraction of rich sands and their transportation to multistage gravity processing complex, which includes washing device and jigging machines for catching fine and plate gold. Bucket and bulldozer blade of scraper-dozer are used for extraction of ordinary sands and their transportation to washing device for single-stage gravitational processing and extraction of poor sands and their transportation into mined-out area with formation of pile for leaching. Tails of gravity processing of rich and ordinary sands are transported by a single-bucket loader into a stack for combined leaching with poor sands.

EFFECT: increasing the technological efficiency of extracting useful components from complex-structure placer sands during the extraction and processing of various types of mineral mass.

1 cl, 3 dwg