RU2272148C1 - Ore pass - Google Patents

Abstract

FIELD: mining, particularly for underground ore deposit and kimberlite pipe development.

SUBSTANCE: ore pass comprises shaft, loading mouth and sieve. The ore pass shaft is provided with conveyer belts suspended to sieve grate so that distances between adjacent conveyer belts are different and defined by maximal dimensions of rock pieces passing between the belts. Sealed elastic shell is arranged in lower ore pass part. The sieve is installed at α=17° - 45° angle to horizontal plane. Lower conveyer belt ends are provided with weights.

EFFECT: reduced degree of rock grinding, increased service life of ore pass members.

5 dwg

Description

The invention relates to the mining industry and is intended for use in underground mining of mainly ore deposits and kimberlite pipes.

A known method of forming a stream of rock mass in ore passages using its energy (application for the invention of the Russian Federation 2002103641, E 21 C 41/00, 2004.02.20). The method includes preparing the rock mass for bypassing, controlled bypassing, receiving rock mass at the bottom of the ore pass or at its intermediate horizons, converting the kinetic energy of the falling and stored rock mass into mechanical or electrical, according to the invention, large-sized formation of a flow of physico-mechanical homogeneous rock mass is carried out by differentiating it first by density and then by particle size distribution, twisting the rock mass during discharge into the ore pass makes the use of a special device that allows you to create a high-density incident stream, in which the collision of rock fragments with the walls of the ore pass and, to a large extent, of its pieces inside the stream is prevented or weakened, which helps to maximize the useful kinetic energy of the stream, controlled by the reception of the falling rock mass, in which, using a special device located along the axis of the ore, the rock mass at the initial moment hits a rigid working plate of the transformation element energy, releasing useful kinetic energy, and then rolls onto the already accumulated rock mass, converting the energy of the falling and accumulated rock mass into primary mechanical energy with its subsequent conversion into working mechanical (or electrical) energy, providing, for example, the operation of crushers, screens, etc. P. The disadvantage of this invention is the high degree of grinding bypassed rock mass.

Known ore pass adopted for the prototype (RF patent 2221147, E 21 F 13/04, 2004.01.10). The ore launch contains a barrel, a mouth for loading, an exhaust device, viewing windows. The ore launching barrel is made integral of at least two sections, with the possibility of their dismantling. A loading funnel is installed at the mouth of the ore pass, consisting of a cone and a nozzle and made with the possibility of entering the barrel under the action of its own weight. The funnel nozzle is 1.01-3.1 the length of the barrel section. The funnel cone is equipped with hooks at the level of its upper cut. The section of the barrel can be made integral along the generatrix of the ore. The disadvantage of this invention is the high degree of grinding bypassed rock mass.

The technical result of the invention is to reduce the degree of grinding of the rock mass, increase the service life of ore elements.

The technical result is achieved by the fact that, according to the invention, the ore discharge barrel is equipped with conveyor belts suspended on screens of screens with a variable distance between adjacent belts, determined by the maximum size of pieces of rock mass to be passed between them, and an elastic closed shell is placed in the lower part of the ore discharge, while the screen is located at an angle α ° to the horizontal plane, lying in the range from 17 ° to 45 °, and at the lower ends of the belts are fixed loads.

The use of the proposed device in comparison with the prototype can reduce the grinding of rock mass bypassing through the ore pass.

The invention is illustrated by drawings, where Fig. 1 shows a vertical section of an ore pass, Fig. 2 shows a fastening unit of a belt to a screen grill, Fig. 3 shows a cross-section of an ore pass, and Fig. 4 shows a load securing unit to a belt, Fig. 5 The screen shows a view along arrow A.

The drawings show:

1 - loading and delivery machine;

2 - rumble;

3 - conveyor belts;

4 - cargo;

5 - unloading device;

6 - tape hook;

7 - tape mount;

8 - ore launching barrel;

9 - screen grill;

10 - mouth for loading;

11 - elastic closed shell;

B ₀ , B ₁ , B ₂ , B ₃ - gaps between adjacent tapes.

The device comprises a screen with grids 9 mounted at an angle α ° to the horizontal plane. The angle α ° to the horizontal plane is adopted in the range from 17 ° to 45 ° in accordance with the angles of repose characteristic of the rock mass of medium lumpiness to ensure the movement of the rock mass along the inclined part of the screen 2 under the action of gravity. The gaps between adjacent tapes B ₀ , B ₁ , B ₂ , B ₃ are taken equal to the maximum size of the pieces of rock mass. On the gratings 9 of the screen 2, for example, on hooks 6, conveyor belts 3 are fastened with a knot 7. At the bottom of the conveyor belt 3, a load is fixed 4. The conveyor belts 3 are arranged with a gap relative to each other equal to the size of the piece of ore bypassed through this channel. Due to the location of the screen 2 at an angle α ranging from 17 ° to 45 °, and the variable distance between the grids 9 of the screen 2 and conveyor belts 3, preliminary ore classification is carried out. Reducing the grinding of rock mass is also achieved by placing in the lower part of the ore pass an elastic closed shell 11, partially receiving impact energy and serving to control the process of dispensing the release of ore.

Mining works as follows. The loading and delivery machine 1 unloads the rock mass from the bucket at the mouth 10 to load the ore pass. Further, the rock mass under the influence of gravity is pre-classified and falls into the gap between the conveyor belts 3. Moving along this gap, the rock mass is braked due to the arising friction forces on the conveyor belts 3 and does not pick up speed as it passes. To reduce the degree of ore crushing, an elastic closed shell 11 is installed on the bottom at the bottom of the ore pass, with the help of which ore is released, pumping and blowing air from it from the compressor.

The use of this invention provides the following advantages:

- reduction of grinding of rock mass;

- increase the service life of the bottom of the ore;

- expanding the scope of this type of device;

- improving labor safety;

- reduction of financial costs.

Claims (1)

An ore containing a shaft, a mouth for loading, a screen, characterized in that the shaft of an ore is equipped with conveyor belts suspended on screens with a variable distance between adjacent belts, determined by the maximum size of pieces of rock mass to be bypassed between them, and an elastic belt is placed at the bottom of the ore a closed shell, while the screen is located at an angle α to the horizontal plane, lying in the range from 17 to 45 °, and at the lower ends of the belts are fixed loads.

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