RU29095U1 - The system of protection against endogenous fires in a mechanized face at the existing site - Google Patents

Description

SYSTEM OF PROTECTION AGAINST ENDOGENOUS KNIVES IN THE MECHANIZED BOTTOM AT THE EXISTING AREA

2002130607

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E2F5 / 00

The utility model relates to the mining industry and can be used in coal mines in the fight against endogenous fires that occur in the worked out space.

A known method for the prevention and localization of endogenous fires using a device for its implementation, including the supply of foam into the worked out space of the reservoir, worked out by a mechanized complex, when the foam is fed through a perforated pipeline laid in a ditch, which is formed by the combine between the complex and the face within the marginal area air permeable zone of the mined-out space (ed. certificate of the USSR No. 1016532, Cl. E 21 F 5/00, 1981).

A disadvantage of the known method and technological system of the device is the incomplete density of the foam curtain in the path of filtration air flows directly in the contour zone, especially on coal seams of high power, due to the destruction of the foam of low multiplicity when it rises from the formation soil through the collapsed rocks, which does not exclude the passage of the ventilation stream to feed the fire in the worked out space and the removal of products of spontaneous combustion in the working space under the complex.

Closest to the utility model is a system for the prevention and localization of endogenous fires in the current area, including the supply of foam through perforated pipes to the worked out space of the reservoir processed by the complex (description of the useful prayer RF JVb 22188, Cl. E 21 F 5/00, 2001).

A disadvantage of the known utility model is the instability of the process of erecting a foam insulating curtain on the path of movement of fire gases of the source of endogenous fire, due to the lack of a feed rate of foam. through horizontal and vertical pipelines, while the foam supply to the zone of near-surface treatment of the formation is assumed to be periodic, and to the bottom-hole zone - increases in multiplicity.

The purpose of the utility model is to increase the effectiveness of the prevention and localization of endogenous fires in the worked out space by increasing the reliability of the process of creating a foam curtain while reducing material and labor resources.

This is achieved by the fact that the system of protection against endogenous fires in the mechanized face at the existing site, including the supply of foam through perforated pipelines in the worked-out space of the reservoir processed by the mechanized complex, while the foam pipeline has a branching equipped with foam control valves for two pipelines respectively to horizontal perforated pipelines and to vertical} (inclined) pipelines in the zone of contouring of a coal seam and the flow rate of components from the pipelines for the supply of compressed gas and a solution of the foaming mixture is controlled by means of installed flow valves and working pressure gauges.

Distinctive features of the proposed process for the implementation of the utility model is the formation of a foam curtain regulated by installed ballasting equipment and ensuring the reliability of the protection of the existing complex while reducing material and labor resources, since the vertical sections are included in the operation by the flow valve 18 in the short-term mode, ensuring the full flow rate of the foaming mixture in perforated pipeline 5 to create a foam curtain and a complete stop of the process.

The figure shows the technological scheme of the implementation of the protection system for mechanized slaughter.

The technological scheme is illustrated by the following main positions:

1 - mined space of the coal seam; 2- dispersant of the foam flow of the upper pipeline; 3- vertical (inclined) section of the pipeline behind the complex; 4,5- horizontal sections of the pipeline; 6- complex mechanized face; 7- manometer for air pressure in the air duct; 8- air regulation valve; 9 manometer of pressure of water; 10 - flow valve; 11 - air duct; 12 water supply hose; 13 - the capacity of the foaming agent; 14-hose feed blowing agent; 15 - flow valve; 16- ejection mixer; 17 pressure foam generator installation “Screen; 18.19 - taps regulating the flow of foam; 20 - ventilation flow of the face.

When there is a danger of an endogenous fire in the worked out space or in order to prevent the escape of fire gases into the working space of the complex 6 face in the path of leakages and leaks in breathable areas (conveyor and ventilation drifts along the path of the ventilation flow 20 of the working face are equipped with protection according to the specified scheme, why pipe branching with flow valves 18 and 19c is connected to the foam pipeline by the pipelines beyond the extreme sections of the complex. t pressurized foam-generating installation "Screen, which under pressure pumps low-pressure foam with a multiplicity of 50-80 into the worked-out space for complex 6, namely, along the sections of perforated pipes 4,5 and vertical pipe 3. The pressure that enters the vertical sections of pipes 3 is ejected through the insert an ejector of a dispersant 2 of a burnt flow the additional volume of the gas mine atmosphere of the worked out space is redistributed on its foam-generating cartridge with the exit of a fine-meshed structure with a high multiplicity (100- 150) already on the formed low-level foam.

obtained on a horizontal perforated pipe section. The advantage of the foam after the dispersant is its greater mobility (permeability) through the crushed rocks and fracturing with obtaining a more reliable foam curtain on the path of fire gases and ventilation flow of the working face. At the same time, there is a fact of “preservation of gas leaks of fire gases in the bubbles of foam, which increases the effectiveness of protection. In addition, the vertical (inclined) sections of the pipes 3 provide constant contact of the volumetric foam curtain as the complex 6 advances with reliable preventive treatment of the side marginal zones of coal, saturating their fracture.

The complex’s protection systems along its marginal zones are periodically switched on by the flow valve 8. The foam multiplicity is achieved by the ratio of the liquid components with their flow rate through valves 10 and 15 and the compressed gas flow rate through valve 8, and operation control is provided through pressure gauges 7.9 and installed on the pressure head foam generator "Screen.

Improving the well-known in practice system for protecting coal mining complexes during the development of fire hazardous seams using the proposed system, allows to increase the effectiveness of preventive work and reduce the cost of their production.

R.V. Dikova

. Myachin

B.V. Chubarov A.E. Chuprikov S.A. Balloons

Claims (1)

The system of protection against endogenous fires in a mechanized face at an existing site, including the supply of foam through perforated pipelines into the worked out space of a reservoir processed by a mechanized complex, characterized in that in the zone of the active face, the foam pipeline has a branching equipped with foam outlet control valves for two pipelines, respectively on horizontal perforated pipelines and on a vertical (inclined) pipeline in the zone of contouring of a coal seam, at m flow components from the compressed gas supply piping and foaming solution mixture through a control valve installed consumables and working pressure gauges.