Abstract
Problems of accumulation of technogenic tailings dumps and as a result of sluicing of gold sands of gravel deposits are considered in article. Additional recovery of fine and dispersed gold from a mineral mass of such technogenic formations can be carried out with use of physical and chemical geotechnologies. The factors influencing on the choice of a way of development of the gold gravel deposit are listed. The mathematical model of a gravel deposit is developed for the solution of the problem of multifactorial assessment of technological options of processing of gold sands. The scheme of the combined development of the gravel gold deposit is offered. Cuvette gold leaching experiments with the photo-electro activated solutions on various reagent basis were executed for the assessment of a developed scheme. Material for the researches was a gravity concentrate (schlich) fraction obtained by tailings gravity concentration (Kia gravel deposit, Transbaikal Territory). The first stage of gravity concentrate (schlich) processing included contacting with photoelectro activated carbonaceous solution (NaHCO3). The first leaching reagent scheme (cyanide solution concentration of 1.5 g/l prepared on the basis of photo-electro activated the peroxide - carbonaceous solution provided 66.8 % gold extraction. The second reagent scheme (active chloride-carbonaceous solution) provided 88.9 % gold extraction.
Highlights
The Russian Far East or Far East Russia (FER) is host to a huge gold endowment and has produced more than 6500 t of gold, since the 1860s
Secondary processing of mineral mass of secondary formations and development of deeplaying sites of a gravel deposit and between-pit pillar is a current problem of the modern mining industry
The mathematical model of the gravel deposit is developed for the assessment of the factors influencing the choice of efficient option of development of mining operations and key parameters of development of gravel deposit and processing of productive sands
Summary
The Russian Far East or Far East Russia (FER) is host to a huge gold endowment and has produced more than 6500 t of gold, since the 1860s. For the solution of the problem of multifactorial assessment of effectiveness of technological parameters of production and processing of gold sands, the mathematical model of the gravel deposit has to be spontaneous and autocorrected For this purpose, the initial information which is based on data of detailed geological prospecting, in process of drilling and approbation of wells, has to be renewed periodically. The offered criterion (PAu) allows to carry out the choice of rational options of development of mining operations and formation and involvement in secondary operation of technogenic formations in the uniform system of mathematical models
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