Ore chute

FIELD: mining industry, possible use during underground extraction of mainly ore formations and kimberlite pipes.

SUBSTANCE: ore chute is provided with elastic, closed covers positioned pair-wise along the height of ore chute shaft and filled with compressed air. They are held on armored hermetic cable for feeding compressed air and on rope. Cover pairs adjacent height-wise are positioned transversely to each other. Diameter d of cover is selected from inequality d>0,5D, where D - diameter or transverse diameter of ore chute. Distance between adjacent pairs of covers vertical-wise along height h is calculated from formula h=10+1/dp, where dp - average diameter of rock mass piece, meters.

EFFECT: decreased degree of size reduction of rock mass, decreased costs of major repairs of ore chute, reduced speed of rock mass during transfer through ore chutes of practically any height.

2 dwg

 

The invention relates to the mining industry and can be used in underground mining mainly ore deposits and kimberlite pipes.

The known method of forming a stream of rock in the ore chutes using its energy (RF patent 2002103641, AS 41/00, 2004.02.20). The method includes the preparation of the rock mass to bypass, controlled bypass, the reception of the rock mass on the bottom of the ore passes or intermediate horizons, converting the kinetic energy of falling and accumulated in the ore passes of the rock mass in the mechanical or electrical, according to the invention, krupnopanelnoye formation of the flow of physical-mechanical homogeneous rock mass is carried out by the differentiation of its first density, and then granulometric composition, the screw thread of the rock mass being discharged into the ore passes do by using special devices that allow you to create the incident flux of high density which prevents or reduces the collision of fragments of rock from the walls of the ore passes and, in largely, her pieces inside a thread that allows you to keep useful kinetic energy of the flow, managed reception falling rocks, which by means of a special device mounted on the axis of ore passes, the flow of the rock mass at the beginning of the local moment hits hard working stove element of energy transformation, releasing useful kinetic energy, and then rolls down on the already accumulated a mountain mass, converting the energy of incident and accumulated the rock mass in the primary mechanical and then converting it into a working mechanical (or electrical) energy, providing, for example, crushers, screens, etc. Drawback of this invention is the high degree of crushing return the fulfilled rock mass.

Known ore passes adopted for the prototype (patent RF 2221147, AS 41/00, 2004.01.10). The ore passes contains the trunk, mouth to boot, outlet, observation window. The barrel of the ore passes are made integral, at least two sections, with the possibility of dismantling. At the mouth of the ore passes installed hopper consisting of a cone and nozzle and is arranged to enter the bore under the action of its own weight. The inlet funnel is 1.01-3.1 section length of the barrel. Cone funnel equipped with hooks on the level of its upper edge. Trunk section can be made integral to the generatrix of the ore passes. The disadvantage of this invention is the high degree of crushing return the fulfilled rock mass.

The technical result of the invention is to reduce the degree of grinding of the rock mass during its pass through the ore passes.

The technical result is achieved by the fact that the ore passes, containing the barrel and the exhaust device according to the invention it is supplied in pairs placed at the height of the shaft ore passes elastic, closed, filled with compressed air membrane mounted on an armored airtight hose for compressed air and the rope, and the neighbouring height of the pair of shells are located across each other, and the diameter d of the sheath accept the inequality d>0,5D, where D is the diameter or transverse dimension of ore passes, and the distance in height h between adjacent pairs of membranes vertically accept the formula h=10+1/dtowhere dto- the average diameter of the piece of rock mass, m

The ore passes is illustrated by drawings, where figure 1 shows the ore passes, the section along the line b-B, figure 2 shows a cross-section of ore passes, the section along the line a-a, where:

1 - elastic, closed, filled with compressed air sheath, made for example from rubber cord;

2 - shaft ore passes;

3 - discharge device, such as a vibratory feeder;

4 - haulage vessel, such as a trolley;

5 - compressor to supply compressed air into the shell 1;

6 - winch for lifting and lowering of cable 7;

7 - rope with zakreplennymi on it by the hose with 8 shells 1;

8 is sealed armored hose for supplying compressed air into the elastic closed shell 1;

9 - grootna grille.

The ore passes the content is it the barrel 2 of the ore passes. In the upper part of the ore passes posted grootna grid 9 for catching oversized pieces of rock mass for further crushing. In the lower part of the ore passes posted by the exhaust device 3, such as a vibratory feeder, designed for controlled release of the rock mass in haulage vessel 4 (e.g. cart). The cable 7 is designed for lowering and lifting armored tight hose 8 for supplying compressed air with a fixed elastic closed shell 1 by means of a hoist 6. Armored tight hose 8 is designed to supply compressed air into the elastic closed shell 1 and connected with the compressor 5. Before descending pair of adjacent height of the shell 1 is fixed on the hose 8, and have them across each other to provide a more effective damping rate return the fulfilled rock mass. The diameter d of the sheath accept the inequality d>0,5D, where D is the diameter or transverse dimension of the ore passes to provide thrust shells each other and the barrel 2 of the ore passes to the almost complete exclusion of the impact of mass shells in working condition on the hose 8 and the cable 7 that allows you to make the height of the barrel 2 ore passes virtually unlimited. The diameter d of the shell 1 depends on the state of ore passes, for example, in flooded ore passes d should be great is, than in "dry" ore passes because of the different values of adhesion of the material of the shell 1 with the walls of the ore passes. Distance height h between adjacent pairs of membranes 1 vertical take by the formula h=10+1/dKwhere dto- the average diameter of the piece of rock mass, m, to the exclusion of the set of high speed return the fulfilled mountain mass and reduce its quality because of overgrinding.

The ore passes is as follows. Using the winch 6 on the cable 7 in the barrel 2 ore passes down armored hose 8 with a fixed elastic closed shell 1 arranged as described above. After descending into the barrel 2 ore passes all of the shell 1 is filled with compressed air through the hose 8 by means of the compressor 5 to fill them, and thrust each other and the walls of the ore passes. The amount of thrust can be determined by using a tension cable 7 using the winch 6. Load-haul-machine (in the drawing conventionally not shown) unloads the rock mass of the bucket in the ore passes. Mountain mass falls on krohotnuyu grid 2 and is bypassed by gaps formed elastic closed shell 1, is filled with compressed air, and the walls of the barrel 2 ore passes. Due to the stress and friction of pieces of rock on the surface of the elastic closed shell 1 there is a decrease in the rate of fall return the fulfilled rock mass. The Sam is of h between elastic closed shell 1, selected according to the formula h=10+1/dtowhere dto- the average diameter of the piece of rock mass, m, provides the most reasonable rate of fall of rock.

The application of the present invention provides the following advantages:

- reducing the degree of grinding of the rock mass;

- reducing the cost of repair of ore passes;

- provides damping of the velocity return the fulfilled rock in the ore chutes almost any height.

The ore passes, containing the barrel and the discharge device, characterized in that it is provided with pairs placed at the height of the shaft ore passes elastic closed, filled with compressed air membrane mounted on an armored airtight hose for compressed air and the rope, and the neighbouring height of the pair of shells are located across each other, and the diameter d of the sheath accept the inequality d>0,5D, where D is the diameter or transverse dimension of ore passes, and the distance in height h between adjacent pairs of membranes vertically accept the formula h=10+1/dtowhere dto- the average diameter of the piece of rock mass, m



 

Same patents:

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FIELD: mechanics.

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FIELD: mining.

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2 dwg

FIELD: testing equipment.

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EFFECT: provision of possibility in laboratory conditions to detect power and kinematic characteristics of chain gate for ore pass for conditions of bulk ore outlet from ore pass with versions of rotary ring location - upper or lower ones.

4 cl, 6 dwg

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