Method of dumping at open mining of mineral deposits

IPC classes for russian patent Method of dumping at open mining of mineral deposits (RU 2509891):

E21C41/26 - Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E21C0047000000); Layouts therefor

Another patents in same IPC classes:

Method of dumping onto inclined base / 2507397

Method involves dumping of an initial tier of dump rocks onto an inclined base with height H that is determined based on the following condition:

H = \sqrt{\frac{2 \cdot V_{o} \cdot K}{K_{o} \cdot L_{o} \cdot (\frac{1}{t g α + t g β})}},

where V_O - overburden rock volume, m³; K - coefficient of water content in paste-like tails after concentrating ore processing; K_O - overburden ratio; L_o - dump length, m; α - natural angle of slope of overburden rock dump, degrees; β - surface slope, degrees, and between the inclined base and slope of the initial dump tier there stockpiled are paste-like tails after concentrating ore processing.

Open cut development method for steeply low stratified deposits / 2506425

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Method involves creation of crushing and reloading stations of a semi-stationary type in sections of boards mainly on the basis of jaw crushers by obtaining a lump with the size of 400-450 mm, and then, additional crushing in screw-and-tooth crushers. Supply of rock mass by means of a feeder to a hopper with further supply to a crushing device for destruction of large lumps with the size of 700-1200 mm by means of a hammer connected with a tie-rod to a rotating flywheel with a slot, and for destruction of average lumps with the size of 400-700 mm by means of a hammer connected to the flywheel through a pin, after lumps are crushed to the sizes of 250-300 mm, they are transferred by means of feeders and conveyors to mobile cone-shaped crushers of average crushing. After that, crushed material of small size is supplied to inclined and high-angle and vertical conveyors to improve mobility and quick movement from one place to another; crushing devices are made in the form of vertical modules and located horizontally, and if necessary, productivity of a crushing device can be increased; for that purpose, more than one slits is made in a plate 250-300 mm wide, and two more slits are made in side zones. With that, impact plate may have supporting surface and possibility of quick movement.

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Method to define quarry borders / 2492324

Method, according to which quarry boards are shaped with slant angles equal to slant angles of working boards, and the quarry is expanded until the current stripping ratio reaches the value of the border stripping ratio. Points of the upper quarry contour are fixed in the final position, then, using the available position of the upper borders, the final depth is found, giving maximum possible value to slant angles of boards at the moment of completion of open works. At the moment of equality between the current stripping ratio and the border one, the slant angle of the working board is increased, provided that the current stripping ratio is equal to the border one.

Method to produce metals from storages of stale wastes of polymetal ore dressing / 2490465

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/ 2244252

/ 2246620

/ 2246621

/ 2249697

/ 2249698

/ 2253015

/ 2254476

/ 2255304

/ 2256075

/ 2256795

FIELD: mining.

SUBSTANCE: method involves extraction of overburden, its transportation to a dumping place and its unloading under dumping front slope. Unloading of overburden and its laying is performed in separate stock piles located parallel to each other, onto the internal slopes of which the smallest overburden rocks are unloaded, and paste-like tailings are dumped between them after benefication processing of ores; at laying of every next stock pile, stockpiling of tailings of benefication processing of ores is performed from the pre-formed stock pile, and distance between stock piles is determined as per a mathematical formula.

EFFECT: improving stability and height of a dumping tier at mixed piling of overburden rocks and paste-like tailings after benefication ore processing.

1 ex, 1 dwg

The invention relates to the mining industry and can be used for dumping at the open development of mineral deposits.

The known method of dumping at the open development of mineral deposits, including transportation of the breed and its unloading downhill waste front, the formation of the blade leading banks, increasing their height, dumping rocks between these mounds [A.S. No. 1033742, IPC³E21C 41/00, 1982].

The disadvantage of this method is the low resistance and the limited height of the dump tier in connection with mixed filling raznopolosnyh rocks, causing a relatively low drainage at the base of the blade and a weak grip of its Foundation with underlying rocks.

Closest to the proposed invention the technical essence is a way of dumping at the open development of mineral deposits, including transportation of the breed and its unloading downhill waste front, the formation of leading banks, increasing their height, dumping rocks between these mounds. Outpacing the mound occiput of hard rock in the form of broken line segments, each of which is at an acute angle to the direction of formation of the waste front, between the OPE is eausie mounds of solid rock occiput weak rocks with the lag front dumping is not less than the difference between the inception of the weak slope and slope of solid rock (RF Patent 2283957, The method of dumping at the open development of mineral deposits, IPC E21C 41/26, published 20.09.2006). Selected for the prototype.

The disadvantage of the prototype is the low resistance and the limited height of the dump tier in connection with mixed dumping of overburden and paste tailings processing the ore.

The invention allows to achieve the technical result expressed in increasing the stability and height of the dump tier when mixed dumping of overburden and paste tailings after processing the ore.

This is achieved by the fact that in the method of dumping at mining operations, including excavation of overburden, their transportation to the place of dumping and unloading downhill dump front, according to the invention, unloading overburden and packing produce separate, spaced parallel to each other in piles on the inner slopes of which relieve most small breeds overburden, and between them warehoused paste tailings after processing the ore, and when laying the next pile deposition of tailings processing the ores is performed with pre-formed pile, and the distance between piles is determined by the formula:

$A = \frac{2 K_{p}^{in} (\frac{h}{t g α} + in)}{K_{in} \cdot K_{p}^{d}} - \frac{h}{t g α^{'}}$

where $K_{p}^{in}$ - the rate of loosening of overburden; h - the height of the pile of overburden, m; α is the natural angle of repose of the pile of overburden rocks, hail; in - pile width overburden along the ridge, m; K_in- overburden ratio; $K_{p}^{d}$ - the rate of loosening ores.

Education piles of overburden, located parallel to each other will enable the storage of paste tailings after processing the ore, and to prevent the spread of pasty material to a stockpile overburden on the inner slopes of the pile occiput most small breeds overburden.

The proposed method of dumping at the open development of mineral deposits is illustrated graphically in figure 1. Where 1 is the pile of overburden; 2 - small breeds sun is Shi pour on the inner slopes of the pile; 3 - paste tailings after processing the ore.

The method is as follows.

When open development of mineral deposits are ahead of the notch strong overburden from the quarry and put them in piles 1 are parallel to each other on the inner slopes of the pile stack most small breeds overburden 2. Between piles of overburden stockpiling paste tailings processing the ores 3, and when laying the next pile deposition of tailings processing the ores is performed with pre-formed pile, and the distance between piles is determined by the formula:

$A = \frac{2 K_{p}^{in} (\frac{h}{t g α} + in)}{K_{in} \cdot K_{p}^{d}} - \frac{h}{t g α^{'}}$

where $K_{p}^{in}$ - the rate of loosening of overburden; h - the height of the pile of overburden, m; α is the natural angle of repose of the pile Stripping the location, hail; in - pile width overburden along the ridge, m; K_in- overburden ratio; $K_{p}^{d}$ - the rate of loosening ores.

A specific example of the method

Order full disclosure of the nature and advantages of the present invention shows an example where the initial data is taken as follows:

degree of fragmentation overburden - 1,3;

stacking height of overburden - 10 m;

the natural angle of repose of the pile of overburden - 38 deg; width piles of overburden along the ridge -15 m; Stripping ratio - 2; factor loosening ores -1,15.

Determine the distance between piles of overburden, m:

$A = \frac{2 \cdot 1,3 (\frac{10}{t g 38} + 15)}{2 \cdot 1,15} - \frac{10}{t g 38} = 18,6 m$ .

The proposed method allows to form a stable final stacks.

The method of dumping at mining operations, including excavation of overburden, their transportation to the place of dumping and unloading downhill otaling the front, characterized in that the unloading of overburden and packing produce separate, spaced parallel to each other in piles on the inner slopes of which relieve most small breeds overburden, and between them warehoused paste tailings after processing the ore, and when laying the next pile deposition of tailings processing the ores is performed with pre-formed pile, and the distance between piles is determined by the formula:
$A = \frac{2 K_{p}^{in} (\frac{h}{t g α} + in)}{K_{in} \cdot K_{p}^{d}} - \frac{h}{t g α^{'}},$
where $K_{p}^{in}$ - the rate of loosening of overburden;
h - the height of the pile of overburden, m;
α - natural angle of repose of the pile of overburden, deg;
in - pile width overburden along the ridge, m;
To_in- overburden ratio;
$K_{p}^{d}$ - greater the loosening of ores.