Method for open extraction of mineral resources deposits

FIELD: mining industry.

SUBSTANCE: method includes extracting quarry to planned depth by ore and rocks extraction by displacement of shelves along horizons with transferring to crushing plants, crushing rocks and then delivering them by lifting device to the surface, during extraction of quarry to planned depth at first stage during construction of board at the end of quarry in zone of decrease of power of deposit in stable rocks conveyer rope system is constructed, connected to hoisting machine, to bed with recesses, allowing to raise crushed material to large height at steep angle and with deepening of mining and displacement of crushers to lower horizons conveyer system is extended to provide for optimal transport shoulder for gathering vehicles.

EFFECT: higher efficiency, higher productiveness.

2 cl, 6 dwg, 1 ex

 

The invention relates to the mining industry, to methods of open development. Method of surface mining steeply dipping deposits includes quarry development to the design depth of the recess of ore and overburden podvigina ledges on horizons with transportation to the crushing plants, crushing the rock mass and subsequent delivery of its lifting device to the surface. When mining quarry to the design depth at the first stage when the offset flanges at the end of a career in the area of the declining power of the Deposit and sustainable rocks make the tie-in Board in the form of a dihedral angle and under a steep angle construct a conveyor cable system connected to the lifting machine, and blade with grooves to raise the crushed material to greater heights under a steep angle and deepening of mining operations and the transfer of crushers on the lower horizons of the conveyor system extend, providing optimum haulage distance for Assembly of motor vehicles.

The method includes a conveyor system that provides rise of crushed material on the surface, is mounted on the structure associated with the two drums mounted on the surface and on the horizon loading, and drive pulley connected with the hoisting machine, and the lower as well as upper, has a branch of namtan the second rope and is driven during operation of a winding machine, the other part of the drum, where rubber is the canvas has a recess for the passage of pit excavation in the canvas conveyor in the form of a “tick” from the front wall close to the vertical, for filling it crushed material dispenser and unloading of material on the site cascading branches occurs under the action of a special rotating wheel rim with tire, which is pressed against the embossing-deepening paintings material from the bottom on cascading branches, presses and pushes the material from the grooves of the corrugation, and then idle the branch moves to the subsequent loading, and the presence of turns of cable on the reel allows you to lengthen as traction, and carrier pipeline system as lowering mining in the quarry.

The method allows to increase the extraction efficiency of the mineral and overburden due to a sharp reduction in the distance of transportation of rock mass on the surface and to improve the performance of processes.

The invention relates to the mining industry and can be used in open development steeply dipping deposits of various capacities.

A known method of processing a career in the development steeply dipping ore bodies, which consists in pogorizontali excavation of overburden rocks and minerals and their transportation AB is transportom in the dumps and transshipment points or concentrator [Kumchev K.A., Maiming WE Design pits. M.: Nedra. - 1960. - 464 S.].

The disadvantage of this method are the high cost of moving a unit of rock mass transport, given the increasing cost of fuel and lubricants, as well as the flow rate of the tire when using rock material for the bedding of the road and a significant distance transportation of rock mass with a relatively small slope roads.

There is a method of field development using steeply inclined conveyor, which consists in the fact that in the beginning of the rock mass is transported to the point of crushing, represented by the crusher primary crushing, and then reloaded onto steeply inclined conveyor and transported under a fairly steep angle on the blade (overburden) or transshipment point (ore) [A. Burr. Prospects for the use of steeply inclined conveyors with anti-squeak tape when CCM Gorn. - 2003. No. 6. - P.52-56].

The disadvantage of this method is that it is necessary to use two conveyor belts (second cloth - presser tape at different lumpiness of rocks requires the pressing of the tape across the canvas tape, otherwise there will be a shift more of the crushed material in the rising stream on the tape. In addition, at steep angles of ascent (up to 10°) lifting height at the height of the vectors 300-500 m and more.

The closest in technical essence and the achieved result is a method of mining, including mining stages (stages since the delivery of the rock mass to the TRANS-shipment point, after which the lifting device of the type skip rises on the steep slope side to the surface [Rzhevsky CENTURIES, AS no Method of field development.].

The disadvantage of this method is that the construction of the lifting mechanism on the steep slope side is possible only with strong sustainable rocks and in shallow career, because the offset side is dostupno with berms. In addition, the lifting mechanism has a cyclic nature of action.

The aim of the invention is to increase the efficiency and productivity of the processes of extraction and delivery of the mineral and overburden from the deep pit on the surface.

This objective is achieved in that the method of opencast mining of steeply dipping deposits includes quarry development to the design depth of the recess of ore and overburden podvigina ledges on horizons with transportation to the crushing plants, crushing the rock mass and subsequent delivery of its lifting device to the surface. When mining quarry to the design depth at the first stage is when the offset flanges at the end of a career in the area of the declining power of the Deposit and sustainable rocks make the tie-in Board in the form of a dihedral angle and under a steep angle construct a conveyor cable system, associated with the lifting machine, and blade with grooves to raise the crushed material to greater heights under a steep angle, and with the deepening of mining operations and the transfer of crushers on the lower horizons of the conveyor system extend, providing optimum haulage distance for Assembly of motor vehicles.

Conveyor system, ensuring the rise of crushed material on the surface is mounted on the structure associated with the two drums mounted on the surface and on the horizon loading, and drive pulley connected with the hoisting machine, and the lower as well as upper, has a branch of the wound cable and is driven during operation of a winding machine, the other part of the drum, where rubber is the canvas has a recess for the passage of pit excavation in the canvas conveyor in the form of a “tick” from the front wall close to the vertical, for filling it crushed material dispenser and unloading of material on the plot cascading branches occurs under the action of a special rotating wheel rim with tire, which is pressed against the embossing-deepening paintings material from the bottom on cascading branches, presses and pushes the material from the grooves of the corrugation, and then idle the branch moves to the subsequent loading, and the presence of turns of cable on the drums poses which enables you to lengthen as traction, and carrier pipeline system as lowering mining in the quarry.

Field development quarry and the reduction of mining operations by lying flank deposits of the angle of slope of the sides more provisions than in the hanging wall side, because the angle is taken in accordance with the fall of the ore body. In connection with this cool and sustainable land Board with built on it lifting mechanism is steeply inclined conveyor 1 - you must ustraivatj in the end side from the hanging sides deposits (decrease of its capacity) in the form of tie-2 like dihedral angle that allows you to create cool sustainable slopes with angles up to 60-80°. Near this site on the lower horizons is mounted crushing plant, which gradually moves to the lower horizons and accordingly extends the pipeline. Similarly solved technically and technologically processes transportation of overburden to the surface with its crushing and shipping steeply inclined conveyor. Crushing unit 3 in the form of a cone or jaw crushers should be installed at sub-vertical reinforced slope of the ledge 4, which facilitates the loading of the crusher. Protect them and lifting device from the effects of explosions due to the use of protective walls and the production of local explosions with charges of small capacity. For the avicenia the efficiency of extraction of the mineral and overburden steeply inclined conveyor mounted on the structure, associated with the reel 5 mounted on the surface and on the horizon loading, and drive pulley connected with the hoisting machine, and the lower as well as upper has a branch wound cable 6 and is driven during operation of the lifting machine. Rubber cloth, placed on an empty area of the drum rotates through the efforts of friction, and the canvas itself in the middle has a corrugation in the form of a notch-holes 7 type “tick” from the front wall close to vertical, it is filled with crushed material 8 dispenser, and he can rise to the height from angle close to vertical. The rubber cylinders-the recess 7 is not crushed, because the drum at the site of attachment of the pipeline creates a recess 9, which describes the form of ribs, grooves 7. The same notch is created on the drive drum, and the unloading of the material on the site cascading branches occurs under the action of a special rotating the wheel rim 10 with a lid type automobile, which nestles on the cylinders-the deepening of the conveyor with the material from the bottom on cascading branches, presses and pushes the material from the grooves of the corrugation, and then idle the branch moves to the next boot.

The supporting structure of the conveyor edges due to the small weight of the cloth tape and transported crushed material can be made is in the form of lightweight beams, based on the support 11 mounted on the ledges. This elevation provides for the free movement of freight and cascading branches cables running in free mode. The number of turns of cable on the reel associated with lifting machine, is calculated on the elongation of the conveyor when the decrease in the career.

The application of crushing and conveyor systems in the career provides not only increase the efficiency of extraction of the mineral and overburden, but also the performance of the processes due to the flow of production work, as well as the reliability of their execution.

The drawings show a section of the quarry with the profile of the non-working side with crushing and conveyor system and element design steeply inclined conveyor.

Figure 1. The General layout of crushing and conveying systems on the ledges of the Board.

1 - steeply inclined conveyor; 2 - insertion in the Board's career; 3 - crushing plant; 4 - sub-vertical scarp; 5 reels; 6 - cables; 12 - feeder-dispenser.

Figure 2. General view of the conveyor 1 with the supports 2 on the slope.

Figure 3. Rubber cloth 1 with ribs-notch.

Figure 4. Diagram of the drive pulley 6 to the conveyor 1 by a recess in the drum 9 and unloading the wheel rim 10 and the crushed material 8.

Figure 5. The scheme pipeline in the context of crushed material 8 and the roller.

6. Canvas conveyor with ribs-notch is loaded with material.

Specific example

For the Apatite-nepheline Deposit Koashva”, presents an inclined reservoir on the basis of techno-economic analysis, determined the depth of the career N. In the example, the value N is equal to 610 m

The quarry development to the design depth is as follows. When the quarry depth of 200-250 m in the North-East and South-East sides are made of tie-2 and constructed trail steeply inclined conveyors 1 with elevation angle of 40-50° depending on the stability of rocks in zones. Track conveyors are selected so that there is the possibility of their extension as lowering mining career by moving the lower drum 5 on the following ledges extension cables 6 and rubber-fabric conveyor. Accordingly, the new length of the conveyor extends bearing structure made of beams and retaining the supports 11. At the new location move and crushing units, type cone crusher SAC or SDP, which provides the desired performance career ore and overburden.

A sharp decrease in distance transportation of ore and overburden truck to the crushing of aggregates and relatively low construction costs of crushing and conveyor systems and small cost of delivery of material to the surface allows p in order to obtain a considerable economic effect compared to the traditionally used by road transport, amounting to tens of millions of rubles a year.

1. Method of surface mining steeply dipping deposits includes quarry development to the design depth of the recess of ore and overburden podvigina ledges on horizons with transportation to the crushing plants, crushing the rock mass and the subsequent delivery of its lifting device to the surface, when performing career to the design depth at the first stage when the offset flanges at the end of a career in the area of the declining power of the deposits in sustainable rocks make the tie-in Board in the form of a dihedral angle and under a steep angle construct a conveyor cable system connected to the hoisting machine and blade with grooves to raise the crushed material to greater heights under the steep angle, and with the deepening of mining and transfer crushers on the lower horizons of the conveyor system extend, providing optimum haulage distance for Assembly of motor vehicles.

2. The method according to claim 1, characterized in that to increase the efficiency of extraction of the mineral and overburden and delivery to the surface is steeply inclined conveyor mounted on the structure associated with the two drums mounted on the surface and on the horizon loading, and drive pulley connected with the hoisting machine, and bottom, as well as the as the top, has a branch of the wound cable and is driven during operation of a winding machine, the other part of the drum, where rubber is the canvas has a recess for the passage of pit excavation in the canvas conveyor in the form of a “tick” from the front wall close to the vertical, for filling it crushed material dispenser and unloading of material on the site cascading branches occurs under the action of the rotating wheel rim with tire, which is pressed against the embossing-deepening paintings material from the bottom on cascading branches, presses and pushes the material from the grooves of the corrugation, and then idle the branch moves to the subsequent loading moreover , the presence of turns of cable on the reel allows you to lengthen as traction and load-carrying pipeline system as lowering mining in the quarry.



 

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