The method of mining of alluvial deposits and man-made accumulations of mineral raw materials

 

(57) Abstract:

The invention relates to the mining industry, in particular to the development of irrigated alluvial deposits of minerals and man-made accumulations of mineral raw materials under conditions of continuous negative air temperatures. The technical result is to increase the efficiency of mining and processing equipment in the development of irrigated alluvial deposits of minerals and man-made accumulations of mineral raw materials under conditions of continuous negative air temperatures. The method includes preparatory and mining, enrichment and dumping. At the same time until the onset of constant negative air temperatures make the water level rise above the mining equipment and trained reserves and installation of fixtures on the height of the water level raising after the formation of ice water dumped to the previous level, and mining and processing operation, as well as dumping on winter produce under the ice surface. 2 C.p. f-crystals, 1 table.

The invention relates to the mining industry, in particular to the development of obligatorily negative air temperatures.

Famous underwater method of placer developments, including preparatory and mining, enrichment and dumping (Shorokhov S. M. Development of placer deposits and principles of design. M: GNTI literature on mining, 1963, S. 481-509).

The disadvantage of this method is the impossibility of its application in the development of irrigated alluvial deposits of minerals and man-made accumulations of mineral raw materials under conditions of continuous negative air temperatures (seasonal operation), which dramatically reduces the annual performance of the mining and beneficiation equipment. Moreover, the shorter the duration of the flush season (the Far North), the less effective mining.

The closest in technical essence and the achieved result to the present invention is an underwater method of placer developments, including preparatory and mining, enrichment and dumping in the conditions of negative temperatures through education lane around mining equipment and its maintenance in the development process (Pots Y. A., Roshchupkin D. C. Hydromega the need for additional mechanisms for the formation and maintenance of the lane, intensive freezing equipment and a sharp decline in the performance of the hardware, operating at low temperatures.

The main objective of the invention is to improve the efficiency of mining and processing equipment in the development of irrigated alluvial deposits of minerals and man-made accumulations of mineral raw materials under conditions of continuous negative air temperatures.

To solve the problem in the way the development of placer deposits and man-made accumulations of mineral raw materials, including preparatory and mining, enrichment and dumping before the onset of constant negative air temperatures make the water level rise above the mining equipment and trained reserves and installation of fixtures on the height of the water level raising after the formation of ice water dumped to the previous level, and mining and processing operation, as well as dumping on winter produce under the ice surface, and the height of the water level raising on mining equipment and trained reserves is determined by the formula

Hin=Nabout+Hthe>- minimum safe limit clearance between the equipment and the inner surface of ice, m

and in the process of mining and processing operations, as well as dumping of produce ventilation space under the surface of the ice.

The efficiency of the mining and mineral processing equipment in the development of irrigated alluvial deposits of minerals and man-made accumulations of mineral raw materials under conditions of continuous negative air temperatures is achieved by the fact that due to space protection under the ice from the influence of external temperature influences the processes of mining and processing operations, as well as dumping of produced with standard temperatures, ensuring efficient operation of equipment and for flushing of the season. Planned downtime can be made only in off-season periods at the time: the rising water, installation of fixtures and freezing of the top layer (autumn); the collapse of the ice layer from defrost and dismantling of the fastening.

Minimum limit of safe clearance between the equipment and the inner surface of the ice may be from 0.5 Dov convection of warm air from the actuators equipment and ventilation space.

To ensure the necessary air quality under the surface of ice is possible ventilation space known methods.

The method consists in the following.

Placer gold Deposit being developed mnogochipovoj mini dredge.

In the summer, carry out preparatory work: the opening of the reservoir Sands on the duration of operation of the dredge in the winter, the construction of hydraulic structures for water levels above prepared to mining stocks, installation mounts to the designed water level. In autumn produce the prepared filling the space with water from sources of local water supply. Draga is afloat in the place prepared stocks. After the formation of ice water dumped to the previous level, and in the icy opening temporary sediment dredge install ventilation systems. Mining and concentrating works, and dumping are produced under the ice surface during the entire winter period. In the spring, before the onset of positive air temperatures, is the greenhouse effect, the temperature of the inside space is increased. To a critical level of destruction layer and alluvial deposits, for which is taken as a prototype, with the proposed method are given in the table.

Thus, the proposed underwater method development placers in comparison with the prototype allows to improve the performance of mining and processing equipment in the development of irrigated alluvial deposits of minerals and man-made accumulations of mineral raw materials under conditions of continuous negative air temperatures.

1. The method of mining of alluvial deposits and man-made accumulations of mineral raw materials, including preparatory and mining, enrichment and dumping, characterized in that prior to the onset of constant negative air temperatures make the water level rise above the mining equipment and trained reserves and installation of fixtures on the height of the water level raising after the formation of ice water dumped to the previous level, and mining and processing operation, as well as dumping on winter produce under the surface of the ice.

2. The method of mining of alluvial deposits and man-made accumulations of mineral raw materials under item 1, characterized in that the height improve is B> = Nabout+Hb, m

where Nabout- the maximum height used in the manufacture of equipment, m;

Hb- minimum safe limit clearance between the equipment and the inner surface of ice, m

3. The method of mining of alluvial deposits and man-made accumulations of mineral raw materials under item 1, characterized in that in the process of mining and processing operations, as well as dumping of produce ventilation space under the ice surface.

 

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