RU2256076C1 - Device for separating air flows in shaft ventilation networks - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: device has air feeding channels, positioned between support and coal massif and ventilator with pipe for sucking air away. Additionally device is provided with curtain of transparent plastic profiles with load, positioned in lower portion of curtain, positioned on carrying ropes, connected to driving drum. The latter is held on ceiling of support section and provided with electric drive with automatic and manual control. Lower portion of curtain enters a space, formed by walling of cable packer and grating. Ventilator, moved with extraction of coal massif, is positioned in ascending air stream in ventilation drift. Width of curtain equals width of support section, and length is in 1.3 times greater than vertical height of support.

EFFECT: higher efficiency.

4 dwg

Description

The invention relates to the mining, mining and construction industry and can be used to ventilate treatment faces when mining mineral reserves with high gas emission.

A well-known ventilation scheme with sequential dilution of harmful substances (Ushakov K.Z., Burchakov A.S., Puchkov L.A., Medvedev II. Aerology of mining enterprises - M .: Nedra, 1987, p.275). Fresh air is fed through the haulage drift, distributed between the treatment face and the worked out space and is discharged through the ventilation drift. The disadvantage of this scheme is the low intensity of methane removal from the treatment space and the removal of methane to the upper part of the lava and to the ventilation drift.

A known ventilation scheme with separate dilution of harmful substances (Ushakov K.Z., Burchakov A.S., Puchkov L.A., Medvedev I.I. Aerology of mining enterprises - M .: Nedra, 1987, p.276). Fresh air is fed through the haulage drift, distributed between the treatment face and the exhausted space and is discharged along the ventilation drift, and the air in the ventilation drift is diluted with a fresh stream. The disadvantage of this scheme is the low intensity of methane removal from the treatment space and the need to maintain workings in the waste space.

A device for the separation of air flows in mine ventilation networks, adopted as a prototype (application for the invention of the Russian Federation, No. 93006328, IPC E 21 F 1/14). The technical result is achieved by the fact that the supply and exhaustion of air to different sections of the mine occurs separately, while all devices are designed to work with gases lighter than air (methane), if they appear, while the ceiling has a semicircular shape with a groove in the center, inclined to the traps for explosive gases. Air supply devices are installed in the recess on the bottom of the face opposite the protrusions, in the center between two traps when the bottom of the face is horizontal, and when the face is tilted up - after the trap, down - in front of the trap. In this case, the suction and air supply pipes are laid underground, which allows blockages to not stop the flow and suction of air into the cut off sections of the mine. The disadvantages of this device are the complexity of the installation and the inability to use in the process of treatment dredging to remove methane.

The technical result of the invention is the ability to use the device for coal mining, increasing the methane removal rate due to the separation of air flows and increasing the air velocity in the treatment space.

The technical result is achieved by the fact that the device for separating air flows in mine ventilation networks, containing air supply channels located between the lining and the coal mass, a fan with an air exhaust pipe, according to the invention is equipped with a curtain of transparent plastic profiles with a load located in the lower part of the curtain placed on the supporting cables associated with the drive drum, mounted on the overlap of the lining section and equipped with an electric drive with automatic and manual control, and the lower I part of the curtain enters the gap formed by the cable-laying fence and trellised fence, and the fan, moved as the coal mass is mined, is located on the outgoing air stream in the ventilation drift, while the width of the curtain is equal to the width of the lining section, and the length is 1.3 times greater vertical height support.

The application of the proposed method in comparison with the prototype allows you to use the device for coal mining, to increase the methane removal rate due to the separation of air flows and increase the air velocity in the treatment space.

A device for separating air flows in mine ventilation networks is illustrated by drawings, in which Fig. 1 shows a diagram of a device installation on a roof support, section A-A, Fig. 2 shows a layout of a device for mining a coal mass, section B-B, in Fig. 3 shows a device, a section GG, figure 4 shows a device, a section BB where:

1 - hydraulic strut support;

2 - hydraulic jack;

3 - front thrust;

4 - back draft;

5 - lateral overlap;

6 - overlap of the lining section;

7 - base support;

8 - draft of the scraper conveyor;

9 - scraper conveyor;

10 - a drum of a veil;

11 - the longitudinal axis of the drum;

12 - transparent plastic profiles;

13 - filling pipeline;

14 - combine;

15 - augers of the combine;

16 - cable layer;

17 - coal mass;

18 - filling array;

19 - capital deviation;

20 - district bias;

21 - recoil drift;

22 - ventilation drift;

23 - treatment face;

24 - fan;

25 - direction of motion of a fresh stream of air;

26 - direction of movement of the outgoing air stream;

27 - pipe for air suction;

28 - cargo;

29 - bearing cables;

30 - cable guard;

31 - trellised fence;

32 - bed;

33 - electric drum.

A device for separating air flows in mine ventilation networks is designed primarily for mining high-gas coal seams. The development of coal deposits is accompanied by large emissions of explosive and combustible methane gas, which, when breaking coal, put restrictions on the load on the working face - a gas ventilation barrier. Currently, due to the significant depth of mining operations, an increasing amount of methane is emitted (the average methane abundance of the mines of the Donetsk and Karaganda basins is 30 and 90 m ³ / min, respectively). In many cases, it is impossible to deal with such quantities of methane in the traditional way (diluting methane with air and removing it from the mine with a ventilation stream) due to the need to supply an extremely large amount of air to the mine and exceeding the permissible speeds of its development. The increase in the movement of lavas on formations with high gas mobility and the expansion of the scope of complexes with hydraulic supports require measures to reduce gas mobility. Preliminary degassing of the developed formation by wells and increasing degassing of the worked out space does not always ensure a reduction in gas mobility to an acceptable level, since the largest amount of gas is released when the coal is broken off by a combine. The amount of air supplied to the face is regulated by the Safety Rules with the maximum permissible speed of the air stream (not more than 4 m / s). By dividing the air jets passing through the treatment space into two directions - extraction (between the coal mass and the cable guard) and human (behind the trellised fence), an increase in the amount of air passing in the immediate vicinity of the coal mass is possible. The minimum amount of air passing through the human direction is calculated on the basis of the minimum permissible air velocity according to the Safety Rules (0.25 m / s).

The coal mass 17 is prepared by major 19 and local 20 slopes, recoil 21 and ventilation 22 drifts. Then a cutting furnace is carried out, a mechanized hydraulic lining is mounted in it and a working face is formed 23. The coal mass 17 is worked out. Hydraulic support 1 of the lining, side overlap 5, overlapping of the lining section 6 and the base of the lining 7 support the rocks of the hanging side. Shunting operations associated with the movement of the combine 14 with the augers 15 are carried out using a hydraulic jack 2, a front link 3, a rear link 4 and a drag of the scraper conveyor 8. Cable layer 16 lay a cable between the scraper conveyor 9 and the cable guard 30. filling pipe 13. The drum 10 of the curtain is placed on the longitudinal axis 11 of the drum with an electric drive 33 of the drum, which is inserted into the frame 32. The frame 32 is rigidly fixed to the overlapping section of the lining 6. Transparent high-strength plastic the plastic profiles 12 are connected with each other, with the drum 10 of the curtain and the load 28 with the supporting ropes 29. The width of the resulting curtain is equal to the width of the lining section, and the length is 1.3 times the vertical height of the lining to provide the necessary stock when moving the lining. The lower part of the curtain enters the gap located on the longitudinal axis 11 of the drum. The gap is formed by the cable guard 30 and the trellis fence 31 to more effectively resist the loads from air movement. The curtain on each section of the powered roof support has an electric drum 33 with automatic and manual control. To enable visual monitoring of the process of breaking the coal profiles 12 are made transparent.

A device for separating air flows in mine ventilation networks works as follows. The air is fed over a major slope 19, then at the haulage drift 21. Then the air passes through the face 23 and is refreshed with a fresh jet on the ventilation drift 22. The directions of movement of the fresh air stream 25 and the direction of movement of the outgoing air stream 26 are shown in FIG. 2. The curtains, being in the lowered position, create a continuous partition dividing the face 23 along the length. Air suction is carried out from the channel formed between the coal massif 17 and the curtains through the pipes 27 for suctioning air using a fan 24, which is moved as the coal mass is worked out 17 and located in the direction of the outgoing stream 26 in the ventilation drift 22. By increasing the air flow rate, passing in the excavation direction (between the coal mass 17 and the curtains), the most effective degassing of the beaten coal is performed. In the human direction (between the curtain and the lining), the air flow is maintained based on the minimum permissible speed of the air stream.

The use of this device for the separation of air flows in mine ventilation networks provides the following advantages:

- the possibility of use in coal mining;

- increased methane removal rate;

- increased load on the excavation site;

- increasing the safety of mining operations;

- reduction in the cost of coal mined.

Claims (1)

A device for separating air flows in mine ventilation networks, containing air supply channels located between the lining and the coal mass, a fan with an air exhaust pipe, characterized in that it is equipped with a curtain of transparent plastic profiles with a load located in the lower part of the curtain placed on load-bearing cables associated with a drive drum mounted on the overlap of the lining section and equipped with an automatic and manual control electric drive, and the lower part of the curtain enters the gap, formed a cable-laying fence and a trellis fence, and the fan, moved as the coal mass is mined, is located on the outgoing air stream in the ventilation drift, while the width of the curtain is equal to the width of the lining section and the length is 1.3 times the vertical height of the lining.

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