SU1700262A1 - Method of fire fighting in blind workings - Google Patents

Abstract

The invention relates to mining and allows to increase safety and reduce the laboriousness of fire extinguishing operations by remotely supplying fire extinguishing substances to the fire center. The purpose of the invention is to expand the tactical capabilities of remote fire extinguishing methods in dead-end workings by preventing pipeline burnout (TP). Fire extinguishing agents are remotely supplied through a flexible ventilation TP. At the same time, the fire extinguishing powder is first supplied, and then the foam. Before feeding the fire extinguishing powder, a flexible TP is collected by the corrugation on the cassette. The supply of fire extinguishing powder is combined with remote movement of the cassette. The cassette is moved at a speed less than or equal to the speed of creating atmospheric robustness, which excludes fiery burning at the front of the end of the cassette. Foam is served simultaneously with the end of the laying of flexible TP. Airing of the excavation begins after completion of the excavation. And lp.

Description

The invention relates to mining and allows to increase safety and reduce the laboriousness of extinguishing a fire by remotely supplying extinguishing agents to the fire.

The aim of the invention is to expand the tactical capabilities of remote fire extinguishing methods in dead-end workings by preventing pipeline burnout.

FIG. 1 shows a remote fire extinguishing installation with a mechanical device for controlling the speed of its movement; in fig. 2 - the moment of filling the production with foam; in fig. 3 - installation with electrical control device

the speed of its movement; in fig. 4 is a schematic diagram of a speed control device.

The method is implemented at the facility (FIG.

1-3) consisting of a source of compressed air energy 1, for example, a foam-powder installation, to which one end of a flexible vent pipe 2 is connected.

Opposite end of the pipeline

2 assembled corrugation 3 on the cassette 4 fixed on vehicle B, for example, in a horizontal workings the vehicle could / t be an electric locomotive, a gyro, etc., and in inclined workings passed from top to bottom transport

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means, there can be mine cars or special platforms, etc. To control the movement of the vehicle 5 (Figs. 1 and 2) and determine its location in the mine workings inside the pipeline 2, a light flexible cable 6 is laid, which is connected to the traction device 8 through the block 7 at one end and connected to a mechanical regulator To the torus 9 of the speed of the vehicle 5. The mechanical regulator 9 can be made, for example, in the form of a spring-loaded lever (not shown in Fig. 1.2).

When using the electric device A (FIG. 4) for controlling the speed of movement of the vehicle 5 (FIG. 3), the cassette 10 is installed on the latter with an electric cable 11 placed therein. The cable 11 is connected at one end to a block 12 regulating the speed of the vehicle 5, and the other end is connected to the control panel located at the mouth of the emergency generation. After reaching the bottom of the vehicle 5, the generation through the pipeline 2 serves foam 13 (Fig. 2).

The method is implemented as follows.

In the event of a fire in a horizontal dead-end development, the sources of fire spread along the generation. Under the action of the heat / mcg pulse, the wooden hitch, the conveyor belt, the rubber band of the cables and the flexible ventilation duct are ignited, ensuring fresh air in the working room. When the ventilation line is broken, the ventilation area in the working area increases, due to the lack of ventilation The formation of explosive concentrations of methane is possible. At the same time, the dead-end generation is filled with combustion products, the smoke and temperature of the atmosphere sharply increase. To eliminate the fire and restore the airing of emergency production, source 1 (Figs. 1 and 2) of compressed air energy is delivered to its mouth by the mine-rescuers, which has the ability to supply air aerosols, for example, a mixture of air and powder or gaseous nitrogen and powder, through a flexible pipe. or a phlegmatizer such as freon (freon) and air and foam, for example, air-mechanical or inert foam. Flexible pipeline 2, consisting of separate sections of flexible pipes with a total length of equal emergency emergency length, cassette 4, vehicle 5, for example, a gyrovoz, electric locomotive, etc., flexible cord 6, block 7 and the traction device 8. The cassette 4 is fixed on the vehicle 5, for example, by means of rochstein. On cassette 4, the corrugation 3 assembles pipe 2. A speed cord 6 is connected to speed controller 9. At the same time, the opposite end of the anvil b is passed through cassette 4 and the free end of conduit 2. Then, block 7 is placed in the free end of conduit 2 stretched inside conduit 2 assembled by accordion 3 on cassette 4, the end of cord 6 and is fixed

on the traction device 8. Thereafter, the free end of the pipeline 2 is connected to the source 1 of compressed air energy and secured with a quick-release clamp (not shown). Thus, the installation is prepared to extinguish a fire in a horizontal dead-end mine,

Simultaneously with the preparation of the installation

to extinguish a fire in an emergency deadlock

. The mine rescuers determine the speed of laying a flexible vent pipe 2 to ensure the creation of a safe atmosphere, eliminating flame burning at the front of the end of the cartridge 4. That is, it is necessary to know the speed of the vehicle 5, on which the corrugation 3 on the cartridge 4 houses flexible pipe 2, mounted at one end on the cassette 4, and at the other end connected to the source 1. The speed of the vehicle 5 is determined from the expression:

V;, - Ј-

4 01-nS

where V is the vehicle speed, m / s;

G - the intensity of the input fire extinguishing powder into the atmosphere of production, kg / s; S is the production area, m;

Tsat - mercury-free powder concentration, kg / m.

. The intensity of the Fire Extinguishing Powder is commonly known and is given in the technical specification of source 1,

for example, powder-foam installation PPU provides powder supply of at least 4-4.5 kg / s. The value of the extinguishing powder concentration is in the range of 70-150 g / m3 and is accepted for each specific case. The area of the production area S is taken according to the mine ventilation section. After determining the V speed regulator 9 is set to the desired speed value and the transport

The tool 5 (Fig. 1), together with the peseta 4, begins to move along the curve. In this way, the flexible conduit 2 is folded from the cassette 4 and, thus, is laid by the PS generation. At the same time, pipeline 2 feeds the fire powder of the walking powder, which enters the emergency generation and forms an air-powder cloud with the concentration of fire extinguishing powder, which prevents flaming combustion. During its movement, the vehicle 5 carries away the cord 6, which, in order to exclude the possibility of its pinching on the protrusions and the unevenness of the soil, is moved inside the pipeline 2. The speed of the cable 6 controls the speed with the help of a counter (not shown) moving the vehicle 5. With an increase in the speed of movement of the transport vehicle 5 (the speed of the vehicle 5 has exceeded the calculated value V), a smaller amount of fire will be received per unit volume of output ear powder than necessary to create a safe atmosphere that excludes flaming combustion, since at a constant intensity G of the powder input with increasing vehicle speed 5, the specific volume of the non-drying powder (air powder) t: a unit of the path will decrease. In order to eliminate this, the device 8 is turned on and an additional tension is created on the cord 6, which renders the space; Link to speed controller 9. As a result, vehicle 5 slows down its speed. Due to this, a sufficient amount of fire extinguishing powder ensures the creation of a safe, safe atmosphere, eliminating the combustion of Gri with a slow motion speed of the vehicle, and means 5 is released into the output at the front of the end of the cassette 4. kgnati, and 6 V peav e of this, the speed controller 9 increases the sorption of the vehicle 5 and thus the possibility of the dried consumption of fire extinguishing powder to create a safe atmosphere at the front of the cassette in units volume alarm generation. The need to create a safe atmosphere of generation and excluding flame combustion exactly at the front of the end of tape A is caused by the powder extinguishing mechanism of the source of fire. This mechanism is to inhibit the active centers of the flame by the surface of powder particles and its decomposition products, which

leads to the termination of the chain reaction ni burning. At the same time, the effect of inhibition is enhanced both by the absorption of heat by particles of powder, which is used to evaporate them, and by the formation of a "vitreous vitreous coating" on the bituminous & the surface as a result of spraying of the powder powder under the action of high temperature, which excludes the access of oxygen to the burning center, to effectively search for all the fire-extinguishing properties of peas, it is necessary to ensure a certain concentration of the powder. This is possible at the front of the end of the cassette 4, TJK. The maximum concentration of powder in the air-powder cloud is reduced. Subsequently, the concentration decreases as a result of sedimentation of powder particles onto the surface Eb, time, etc., and due to - and the proposed method of the feature — the movement of the cassette is carried out at a speed less than or equal to the speed created. safe atmosphere, eliminating the fiery burning at the front of the cassette torso, in contrast to the known method, it was possible to significantly expand the tactical ieso3-ic hoc distant fire tracing methods by combining space and time processes in space and time. laying of the pipeline 2 and the hearth and the outside of your powder at one time; 11.11 units of volume of safe and safe flammable gorenger on the front of cassette 4 as a result of underflowing rot about tchmalcho speeds move by) means 5. After By means of a 5-tsch T / PIKOEO oyabstki pipeline ”(l) I begin to put foam 13, for example, air-mechanical or inert-s, floor by the pressure developed by source 1, foam 13 gradually fills emergency vrabo go. In this case, the cooling of the walls of the excavation occurs due to the absorption of heat from the accumulation of rocks by the heat from the foam 13, the heat of the mountain pori i. pacxoqyeic on heating and evaporation of the liquid fraction of ness. 13, which provides rapid cooling of generation. After the production of foam 13 by septum through pipe 2, fresh air is supplied and airing is started. This eliminates the possibility of methane accumulation, since the airing of the development begins earlier than the destruction of the foam 13 due to the liquid fraction flowing out of it. This is achieved by stopping the supply of foam 13 to the production of it (foam)

mass settles, forming between the level of its surface and the roof of the channel. Since methane is discharged from the coal mass through the entire time the accident was liquidated, methane accumulates at the roof of the mine. If during the supply of fire-extinguishing aerosols (powder) when the vehicle 5 moves and the pipeline 2 is laid out to generate methane, it is partially removed due to the movement of the outgoing air stream, then at the moment of filling the production with foam 13, the methane emission almost stops as it is absorbed foamy flow. At the same time, methane gradually diffuses through the foam and accumulates in the upper part of the foam flow during the movement of the latter through generation. Therefore, simultaneously with the formation of the channel indicated above, the latter is filled with methane. However, due to the fact that the airing of the mine starts immediately after the end of filling it with foam 1, fresh air supplied to the bottom of the mine through pipeline 2 enters the space (channel) between the surface level of the foam 1 and the roof of the mine and flushes the methane. At the same time, the rate of removal of methane from the specified channel reaches a significant value, since the area of its cross section is significantly less than the area of the cross section of generation.

In order to increase the convenience of driving the vehicle 5, the latter is equipped with an electric speed control device A (Fig. 3). Electrical triple A (Fig. 4), consisting of cassettes 1 .. 10, which in layers, for example, in the form of a snake, houses an electrical cable 11 connected to block 12 and ironing console, is installed on the transport

Means 5. Moreover, block 12 is connected to a speed counter (not shown in Fig. 3) of vehicle 5 movement. When a vehicle is moving, 5 a counter records the speed of movement and information goes to block 12, from where it is transmitted to the console via an electric cable 11 management Upon receipt of information about the speed of the vehicle 5, the operator (not shown in Fig. 3) compares the actual speed value with the calculated one and makes the appropriate adjustment. The speed control of the vehicle 5 can be controlled automatically when the estimated speed 5 is installed on the control panel 13. Further, the operations for extinguishing the fire, cooling the generation and airing it are performed as described above.

Claims (1)

Claim Method for extinguishing a fire in a dead end, including supplying foam through the pipeline after it has been laid and airing the generation, characterized in that, in order to expand the tactical possibilities of remote fire extinguishing methods by preventing pipeline burnout, the pipeline is corrugated on a cassette that is moved from a speed less than or equal to the speed of creating a safe atmosphere, eliminating the fiery burning at the front of the end of the cassette, while simultaneously moving along the pipe the wire is fed with powder; in this case, after completion of laying the pipeline, foam is supplied through it, and after filling out the PCb production, the production is ventilated.  five 5 to 2