Method of open mining of mineral deposits with forming of dump with large volume and height in difficult conditions

FIELD: mining.

SUBSTANCE: invention relates to the method of open mining of mineral deposits with creation of a dump. The method includes separation of career space by zones, height and pit perimeter, cutting of ledges and horizons on which overburden and mining works with removal of rocks by truck or by rail into dumps and via ore chutes to reloading points are conducted, and dumps are built up using the cyclic action facilities. Meanwhile a convex form of a working edge is formed, gradually being fitted into the edge differentiated by steepness on a final contour which is built up in view of minimum disturbance of walls of slopes and a edge according to the technology with minimum consumption of explosives (E) with removal and dumping of rock into a main dump located near a zone of overburden works outside a contour of a steep edge of a pit of the 1st phase; initially temporary dumps are used with self-transportation of rocks outside a pit, and with their partial re excavation, provide the minimum shoulder of tramming of rocks and ore using the crushing reloading points and conveyors from inclined planes on the top horizons to the steep and vertical at completion of a pit. And with deepening of mining operations the overburden zone is divided into two sites and rock is moved by combined transport from two sides into a dump under construction parallel to a edge slope in view of deformation of its separate sites, and rock dumping on a dump after crushing is carried out by line transport facilities using the mobile console, the minimum shoulder of tramming of rock and ore and costs of development of mountain weight on the first and the subsequent stages (turns) are ensured, and the first two layers of a dump are dumped according to cyclic and line TsPT technologies using motor transport or loaders (at re-excavation of rocks) that provides stability and robustness of the dump front according the developed technology of dumping, at the final stage the third layer is dumped, and the fourth layer of dump if necessary, according to its calculated volume and height and limit depth of a pit.

EFFECT: improvement of efficiency of field development during construction of a dump with large volume and height at decrease of costs of stripping and improvement of safety of dumping.

4 dwg

 

There is a method of development of the field deep in the quarry with the creation of dumps large capacity beyond career field application of road and rail transport [1].

The disadvantage of this method are considerable distances to waste disposal and, as a consequence, large development costs mineral properties.

The known method of dumping of large capacity in the development of Nagorno-field application mainly road transport [2].

The advantage of this method is that it applies to trucks with a lifting height of 400-600 m from the dump sites located at a distance of 2-4 km from the quarry, which causes significant costs to transport the rocks to the final platform.

Closest to the proposed to the technical essence and the achieved result is the method of development of the field deep in the quarry with the use of cyclic-flow technology (CCM) [3].

The disadvantage of this method is that it is necessary to construct pretotal in the quarry I-th queue in the creation of the CCM and its subsequent transfer for career paths at the end of testing.

The aim of the present invention is to increase the efficiency of field development in the construction of high dump large capacity is ri reducing the cost of moving overburden and security of dumping.

This objective is achieved in that in the known method open pit mining of mineral deposits with the creation of the dump large capacity and height, including the division of career space zones, the height and the perimeter of the quarry, cutting ledges and horizons, which are development and production operations with hauling rocks road, and sometimes by rail in the dumps and through the ore chutes at the transshipment points, and dumps build a small height mainly by means of cyclic steps, characterized in that the parameters set career not only the value of the ore and demand, and given the complex use of raw materials long-time extracted in the quarry, which increases the depth of the quarry to the limit and work lead with the lowest coefficients of overburden, create the convex shape of the working edge, gradually blending into differentiated by the steepness of the Board on the final circuit, built with the minimum disturbance of the walls of the sides and the Board by special technology with a minimum consumption of explosives (e) hauling and dumping rocks into the main blade which is placed near the area of conducting Stripping for the path steeply inclined side career of the I-th queue, use original temporary stockpile is with semitransitive rocks abroad career and with their partial preexcavation, provide minimum haulage shoulder rocks and ores with the use of crushing and handling facilities and conveyors inclined from the upper horizons to steeply inclined and vertical when finalizing career, and with the deepening of mining overburden zone is divided into two sections and move the breed combined transport with the two sides in the construction of the blade parallel to the slope of the Board, taking into account the deformation of its separate parts, and dumping rocks on the blade after crushing carried out by means of a flow of transport, for example, the use of mobile console, provide the minimum haulage shoulder rocks and ores, minimal development costs of the rock mass on the first and subsequent stages (queues)and make the filling first two tiers of the blade combined technologies CCM with the use of vehicles or loaders (if preexcavation rocks) that ensures the stability and sustainability of the dump in front of the developed technology of dumping, at the final stage occiput third, if necessary, and the fourth tier of the blade in accordance with its estimated capacity and height and maximum depth of the pit.

The advantage of the proposed method of field development with the creation of the blade height and capacity is that initially, the placement poro the Stripping is done at sites near and inside the final career path with offset part of dumps for the contours of the final quarry (temporary dumps) with partial preexcavation and create a master multi blade directly at the end of the path, and when it is dumping use an embankment causing the area with a filling of pretotal for the CCM using slopes. When applying the CCM on the overburden and ore (ore passes) is the minimum distance of the shoulder transportation of rock mass from all areas of field development, and the proposed technology dumping rocks with regard to geological and climatic factors ensures the safety of operations.

In the drawings, Fig. 1-4 shows the main fragments of the development of the field in dumping high dump large capacity.

Fig. 1. The outline of the ore body in the quarry top-down (in section):

1 ore body; 2 - slope side project; 3 - the proposed slope side; 4 - secondary breed overburden; 5 - working Board.

Fig. 2. The layout of the blade near the quarry (broken): 2 - slope side project; 3 - slope side (proposed); 6 - predator the slope of the blade on the project, a temporary dump; 7 - the slope of the blade (offer).

Fig. 3. The layout of the piles relative to the career path (plan):

8 - pit; 9, 10, 11 - advanced dumps; 12 - strip-blade, 13 - outlines the construction of the blade 7; 14, 15 - ore chutes; 16 - crushing mobile node; 17 - conveyor line.

Fig. 4. The layout of crushing complex (ATC) in the developing and secondary transportation of overburden rock in the dump:

16 - crushing mobile node (mobile); 17 - conveyor line; 18 console when unloading rocks downhill; 19 - the slope of the blade.

An example of a specific implementation of the method

The method can be implemented on existing Coachinc.com career Apatite-nepheline ores East of the mine and construction career Central mine of OJSC "Apatit", forthcoming working side of the ore body East Rasvumchorr".

At the first stage of the career options set not only the value of the ore and demand, and given the complex use of raw materials long-time extracted in the quarry, which increases the depth of the quarry to the limit and work lead with the lowest coefficients of overburden, create the convex shape of the working Board 5, gradually blending into differentiated by the steepness of the Board 3 on the final circuit, built with the minimum disturbance of the walls of the sides and the Board by special technology with a minimum consumption of explosives (e) hauling and dumping rocks into the fixed blade 7, have near a zone of doing Stripping for the path steeply inclined side career of the I-th queue 3.

For this quarry 8 I-th stage (stage) with sides lying flank deposits of 1 enables opening of the trench and carry out the cutting ledges on overburden and ore with increasing the camping steepness desktop Board 5. Works are in the direction of the end side 3 career, build a Fort with increasing steepness, respectively, increasing the strength of the rocks arrays (declining fracturing with depth). The rock overburden is transported to predator 6 within the boundaries of I-II stages of development of the ore body 1, additional dumps 9, 10, 11, or barrow for transporting rocks cyclic-flow technology (CLT), use the original temporary dumps with semitransitive rocks abroad career and with their partial preexcavation provide minimum haulage shoulder rocks and ores with the use of crushing and handling facilities and conveyors inclined from the upper horizons to steeply inclined and vertical when finalizing career. With increasing shoulder haulage of rock and ore up to 4-5 km arrange crushing and handling paragraphs 16 and separate Stripping zone into two areas and build the first and the second tiers of the blade 7 with the contours 12, 13 parallel to the slope of the sides 3 by dumping rocks on two sides with regard to the possible deformation of the sections of the blade with minimal shoulder haulage and application of the console 18, and the ore is achieved by the construction of the ore chutes 14, 15, passable, including across the ore body. Cost minimization reach those that used mobile crushing system 16 with maximum performance on the basis of the cone d is abilock (breed) or jaw during low productivity of ore and trucks at low shoulder haulage rocks or ores (for example, 0.4 to 0.8 km (bucket capacity E=12-16 m3especially when preexcavation rocks (secondary Stripping) 4.

With the deepening of mining low-inclined conveyors 17 (angle α=15-16°) is replaced by inclined (30-40°), and in the course of deep zones rebuild parts of the Board 3 with the slope of 60-70°, and use of steeply inclined conveyors (SIC), when finalizing career apply vertical conveyors, which are used crusher (cone) secondary crushing so that the height of the delivery of the remaining part of the ore accounted for Assembly of motor vehicles of about 200 m, on rock finished third tier of the blade 7, and if necessary, the fourth tier with minimal shoulder haulage rocks. Volume dumps can be 250-400 million meters of rocks in the production of over 200 million tonnes of ore. So the quarry can be completed to a maximum depth with a minimum expenditure of national economic resources.

The source of information

1. Khokhryakov B. C. Design standards. M.: Nedra, 1980.

2. Ryzhkov, A. N., Okanovic A. C. Second life Plateau Rasvumchorr. M: Mining magazine. No. 7. - 2009. S. 46-51.

3. RF patent №2310077. Method of forming high tier blade. Publ. 10.11.2007. Bull. No. 31 (prototype).

The method of open pit mining of mineral deposits with the creation of the blade, including the division Kari is REGO space areas, the height and the perimeter of the quarry, cutting ledges and horizons, which are development and production operations with hauling rocks first by road or rail in the dumps and through the ore chutes at the transshipment points, and dumps build by means of cyclic steps, characterized in that the parameters set career not only the value of the ore and demand, and given the complex use of raw materials long-time extracted in the quarry, which increases the depth of the quarry to the limit, and work lead with the lowest coefficients of overburden, create the convex shape of the working edge, gradually blend in differentiated by the steepness of the Board on the final circuit, built with the minimum disturbance of the wall jambs and Board technology with a minimum consumption of explosives (e) hauling and dumping rocks into the main blade which is placed near the area of conducting Stripping for the path steeply inclined side career of the I-th queue, use the original temporary dumps with semitransitive rocks abroad career and with their partial Paretskaya provide minimum haulage shoulder rocks and ores with the use of crushing and handling facilities and conveyors inclined from the upper horizons to a steeply and the slight pressure from the beginning when finalizing career, with the deepening of mining overburden zone is divided into two sections and move the breed combined transport with the two sides in the construction of the blade parallel to the slope of the Board, taking into account the deformation of its separate parts, and dumping rocks on the blade after crushing carried out by means of a flow of transport travelling console, provide the minimum haulage shoulder rocks and ores and development costs of the rock mass on the first and subsequent stages (queues), and make the filling first two tiers of blade cyclic-flow technology of the CCM with the use of vehicles or loaders (if preexcavation breeds) that ensures the stability and sustainability of the dump in front of the developed technology of dumping, at the final stage occiput third, if necessary, and the fourth tier of the blade in accordance with its estimated capacity and height and maximum depth of the pit.



 

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EFFECT: higher efficiency, higher productiveness.

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EFFECT: higher efficiency.

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FIELD: mining industry, applicable for slanting of high benches at development of magmatic deposits of mineral resources by open pit.

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EFFECT: enhanced stability of high benches on the outline of the open pit.

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FIELD: mining industry.

SUBSTANCE: method includes opening deposit at distance 150 meters from river and forming of natural filtering wall between river and trench, pumping of water from trench into river, extraction of mineral resource, revegetation of dumps, filling of trench with water, accomplishment of formed water body. Mineral resource is extracted from two serially opened trenches - auxiliary, revegetated as water body, and main, positioned at opposite side of river, and soil from opening of which is used for revegetation of auxiliary trench, while in main trench along whole board on the side of river right beyond mining operations inner dump is formed with width not less than 250 meters and with height at same level with earth surface, water from trenches is fed into river, and then into water body through intermediate collectors, while after forming of water body currents of soil waters between trenches and river are made balanced, balance level is estimated on basis of water levels in auxiliary trench and river.

EFFECT: higher efficiency.

1 dwg, 1 ex

FIELD: mining industry.

SUBSTANCE: method includes extraction of quarry to planned depth in stages with construction f boards with parameters, allowed from stability condition, shutting boards, finishing mineral resource massif. Building and shutting of temporary boards during extraction of steep layers of next level after change of order of extraction of opening and ore zones is started after construction and spacing in center of cut of well-like mine with vertical shelves, with parameters, which are provided for by minimal radiuses of rounded edges enough for movement of rock via spiral chutes to surface to outer dumps, with narrowing space towards bottom at level of opened level of deep portion of deposit with lesser total coefficient of opening of stage and finally board is constructed by steep vertical shelves in deep zone.

EFFECT: higher efficiency.

1 ex, 10 dwg

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