Method to mine gravel deposits of minerals

FIELD: mining.

SUBSTANCE: in the method to mine gravel deposits, including contouring of balance reserves by data of exploration wells, opening of a sand bed, performance of opening and production works, after contouring of balance reserves the opening works are carried out with solid transverse trips into a dump to the level of the maximum elevation of the balance reserves contour. Production works are started by slabbing with a bulldozer in the area of the maximum elevation of the balance reserves contour with transportation of sands into a mined space. Each subsequent lifting of the balance reserves contour is mined in the similar manner, peats located between lifts of the balance reserves contour are transported through slabbing with secondary displacement into the dump.

EFFECT: reduced operational losses of a useful component.

2 dwg

 

The invention relates to mining and can be used in the development of mineral deposits, mainly for the development of placer deposits in an open way.

The known method of placer developments, which do not produce Stripping and mining complex carries out simultaneously the excavation of peat and sand (Leshkov VG Theory and practice of development placers mnogozachatkovye dredges. - M.: Nedra, 1980, s).

The disadvantages of this method are: significant metalliferous ore Sands; the reduction of mineral extraction with 1 m3rock mass; depreciation of mining equipment; increases in the cost of production, leaching and enrichment of the Sands, and also the period of mine.

The closest in technical essence and the achieved result for the proposed method is a method of placer developments with jurisdiction Stripping, and the contour of industrial stocks in the top of reservoir Sands set horizontally with mark, depending on the technical, geological and economic factors (Varicak M.I., Nadolski V.I. Optimization of parameters of open pit mining of placers, - M.: Nedra, 1985, p.76-78).

The disadvantages of this method are significant technological losses of useful components the NTA with the peat overburden. This is due to the fact that the top layer of sand is rising and falling (due to uneven distribution of the useful component), and the border industrial stocks is thus that part of the reserves is located above the path of industrial stocks in the top of reservoir Sands. In this case, the contour of industrial stocks in the top of reservoir Sands set horizontally, with optimization level, the maximum obtained by the company from the sale of useful component of profit.

The present invention is the reduction of operating losses of useful component.

This task is achieved by the method of placer developments, including the delineation of reserves according to exploration wells, the opening of the reservoir Sands, management of overburden and mining, after contouring balance reserves Stripping conduct continuous transverse trips to the dump to the level of the maximum point of the contour balance reserves, mining operations begin longitudinal benches bulldozer in place of the maximum point of the contour balance reserves with the transportation of sand in the mined-out area, each subsequent raising of the contour balance reserves mined in a similar way, peat, located between elevations protractor which have longitudinal benches with a secondary movement in the blade, and on reaching the mark of mining and Stripping operations to the level of the lowest level of the path of balance reserves of the mining work is carried out by known methods.

Stripping a continuous transverse field level maximum level contour balance reserves represent the minimum performance dilution useful component. Mining longitudinal benches bulldozer in place of the maximum point of the contour balance reserves lead to a more complete extraction of the component with the lowest losses. Transportation of peat located between elevations, longitudinal benches with a secondary movement in the blade allows to simplify the scheme of the organization of movement of transport.

The invention is illustrated graphically in figure 1 and figure 2 below:

1. the solid direction transverse trips bulldozer;

2,4. the maximum contour balance reserves;

3,5. the direction of the longitudinal faces of the bulldozer;

6. the minimum contour balance reserves;

7. the space between the two maximum contours balance reserves;

8. the direction of transportation of peat longitudinal benches from the space between the two maximum contours balance reserves;

9, 10. the spacing of the flanges on the Sands;

11, 12. production of sand processing with Macs is imally contour balance reserves.

The figure 1 shows a cross-section of alluvial deposits on exploration line. Above the line of the surface shows the number of exploratory wells (I, II, II,IV). According to the results of exploration and established conditions conducted contour balance reserves on the top of reservoir Sands 2. Initially, the opening of the reservoir Sands and Stripping produces a continuous cross-visits 1 bulldozers in external dumps (figures not shown) on the two sides of the placers. Moreover, work is carried out to the maximum level contour balance reserves 2 with a spacing of 10 boards.

Mining operations begin longitudinal benches 3 bulldozer with the maximum level of the contour balance reserves with the transportation of sand in the developed space, with the formation of the notches 12. Each subsequent rising contour balance reserves 4 mined longitudinal benches bulldozer 5 with the creation of production 11. Peat 7, located between the elevations of the contour balance reserves 2 and 4 are transported longitudinal benches 8 with a secondary movement of peat 1 in the dumps. Upon reaching the mark of overburden and mining operations to the level of the lowest level contour balance reserves 6, mining operations should be performed by known methods, for example by opening with a spacing of the flanges 9.

Method development placer mestorozhdeniya fossil, including delineation of reserves according to exploration wells, the opening of the reservoir Sands, management of overburden and mining, characterized in that, after contouring balance reserves spend Stripping solid cross-trips to the dump to the level of the maximum point of the contour balance reserves, mining operations begin longitudinal benches bulldozer with the maximum level of the contour balance reserves by transporting sand in the goaf, each subsequent raising of the contour balance reserves work in a similar way, peat, located between the elevations of the contour balance reserves transported longitudinal benches with a secondary movement in the blade.



 

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