SU1754904A1 - Method for fighting fire in mine working - Google Patents

Abstract

Use: for remote extinguishing fires in actively aired workings. SUMMARY OF THE INVENTION: Front and rear formwork panels are assembled in an emergency working area at a safe distance from the fire source. A pipe is installed on the rear wall on which a corrugated pipe collects, the free end of which is connected to the source of foam. The formwork is remotely filled with foam. After that, the formwork is moved towards the fire. Simultaneously with the movement of the formwork is the laying of the pipeline. The foam in the inter-deck space is supplied at a speed greater than the speed at which the formwork moves. 8 il.

Description

The invention relates to the mining industry and can be used to remotely extinguish fires in actively aired workings.

There is a method of extinguishing a fire in a mine working, which includes blocking the generation of a jumper, obtaining foam and transporting it along the mine working.

The disadvantage of this method is that when it moves, the stream of foam fills the entire cross section of the mine workings, as a result of which the ventilation of the latter is disturbed. As a result, the airing of the whole chain of mine workings located behind the fire site is stopped. This leads to a dramatic decrease in the safety of fire extinguishing in gas mines due to the possibility of the formation of explosive concentrations of methen.

The closest in technical essence to the invention is a method of extinguishing a fire in a mine working, which

implemented as follows: one end of the pipeline is fixed on the jumper, the opposite end of the pipeline is collected by corrugation on the cassette, the foam generator is connected to the jumper and block production, then the foam is supplied for the jumper and simultaneous movement of the pipeline, the cassette is moved remotely inside the foam flow, and the speed of the end of the cassette is equal to the velocity of the front-flow flow in the generation, and the velocity of the front of the foam flow is greater than the velocity of the front of and fire.

The disadvantage of this method is the narrow range of application — inclined downward production, high foam consumption, high azdynamic resistance to air flow through the jumper.

The purpose of the invention is to increase the efficiency of fire extinguishing by providing intensive foam wetting of the entire cross section of generation

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The goal is achieved by the method of extinguishing a fire in a mine working, including connecting a pipeline, one end of which is assembled with corrugations, to the source of foam and remote laying of the pipeline to the fire center with simultaneous supply of foam, additionally, before laying the pipeline in the mine, formwork, walls which is made with the possibility of supplying foam to its outer surface, oriented towards the center of the fire, and connect the corrugated end of the pipeline to the formwork, with this DKU pipeline carried out simultaneously with the movement of the formwork, and the foam is fed to mezhopalubochnoe space with a velocity greater than the velocity of movement of the formwork.

Figure 1 shows a remote fire extinguishing installation; figure 2 - section aa in figure 1; on fig.Z - section bb in fig, t; figure 4 - node I in figure 1; figure 5 - installation with the possibility of supplying foam on the outer side of the formwork; figure 6 - section bb In figure 5; figure 7 - installation, in which the front wall of the formwork is installed with a slope; Fig. 8 shows a variant of using the installation for extinguishing a fire in an inclined excavation.

The method is implemented using an installation consisting of front 1 and rear 2 walls, which together with the side surface of form making 3 form lintels, pipe 4, pipe 5, pipe b and sections 7. Front 1 and rear 2 walls are movable in working for example, mounted on the vehicle 8. The front wall 1 is configured to supply foam to the outer surface 9, for example, through the openings 10. Sections 7 are installed with the possibility of changing the installation angle in the direction opposite to moving units 1 and rear 2 walls, for example, using a spring 11 fixed at one end on section 7, and the other on pipe 4, and axis 12, on which section 7 is mounted. At pipe 5, corrugated 13 assembled pipe 6, which is connected to the free end to the source (Fig. 1.5, 6, 7, not shown) of the foam 14. The vehicles 8 are connected to each other to ensure synchronous movement with the help of the rod 15. At the same time, the front 1 and rear 2 walls can be mounted on the vehicle 8 (the embodiment in figs 1.5,7 and 8 is not shown). In case of installation of the front 1 and rear 2 walls at a large distance (for example, 10-15 m) from each other, the pipe 4 has

intermediate supports 16. In its movement to make formwork 3, filled with foam 14, it hits the center of fire 17 and extinguishes the latter. When extinguishing a fire in

slanting vehicle 8 using a rope 18 mounted on a winch (not shown in Fig.8).

The method is implemented as follows.

0 In emergency production, at a safe distance from the source of fire 17 on vehicles 8 (on one vehicle 8), sections 5 around pipe 4, located on supports 16, collect 5 days 1 and rear 2 walls. In this case, sections 7 are installed with the possibility of overlapping each other and generation. To ensure that the sections 7 are hermetically sealed to each other and the sections 7 are developed along the contour

0 are fastened, for example, by a nut-bolt seal connection (not shown), made, for example, from a thin elastic metal or a conveyor belt, followed by coating with metal. At the same time for

5, the overlap improvements of the section 7 are made in the form of diverging beams, the cross section of which increases from the pipe 4 in the direction of the outlet contour. On the back wall 2 is installed a side 5, on which corrugated pipe 13 is placed 6, the free end of which (not shown) is connected to the source (not shown) of the foam 14. Section 7 is installed with the possibility of changing the angle of their installation in the opposite direction to movement front 1 and rear 2 walls. This is achieved, for example, by securing section 7 on axis 12, which is adapted to change the angle

0 of the installation of section 7, the return of sections 7 to the initial position is provided, for example, by installing springs 11 on the axis 12, which are fixed at one end to section 7 and the other end to pipe 4. Herewith

5, the springs 11 are selected so that their elastic properties allow the sections 7 of the front 1 and the rear 2 walls of the formwork to maintain their normal position when they are subjected to the force generated by the action of

0 the outer surface 9 of the formwork 3 of the oncoming airflow, and be deflected upon encountering an obstacle. To synchronously move the back 2 and front 1 walls if they are located on independent

5 from each other, the vehicles 8, the latter are connected by a pull 15. The rear 2 and front 1 walls together with the working surface bounded by the front 1 and rear 2 walls form lintels 3, into which

Pipe 6 is fed through pipe 5 through pipe 14. After filling the formwork 3 with foam 14 remotely, for example, as a result of switching on a hydraulic locomotive or electric locomotive on which the front 1 and rear 2 walls are mounted, vehicles 8 are moved in the direction of the fire source 17. As a result the movement of vehicles 8 in the development towards the fire 17 is moving formwork 3 lintels. At the same time, simultaneously with the movement of the formwork 3 along the development from the branch pipe 5, the pipeline 6 is laid and laid along the generation. Moreover, through the pipeline 6, foam is continuously supplied to the inter-deck space of formwork 3. Moving through the development, formwork 3 does not significantly affect the air stream moving through the production due to general depression, since the stream, due to the presence of pipe 4, can pass through formwork 3 in any direction, which provides an extension of the field of application of the claimed method. When an abrupt change in the configuration or the cross-sectional area of the excavation occurs, since, when encountering an obstacle, section 7 (or section 7) changes the mounting angle from the obstacle, thereby passing an obstacle, for example, reinforced concrete tightening or support elements protruding into the excavation space, through formwork 3. Moving on the fire site 17, the outer surface 9 of the front wall 1 of the formwork 3 is exposed to high temperatures. However, due to the fact that the inter-deck space of formwork 3 is constantly filled with foam. 14, heat is intensively removed from the front wall 1 by heating and evaporating the liquid fraction of the foam 14, and thus the front wall 1 is prevented from burning. At the same time, the vapor of the liquid fraction of the foam 14 and its gas component coming out of the formwork 3, through the existing

leaks in the front 1 and rear 2 walls in the free space of the mine, and the emptying space is filled with fresh foam 14. At the same time, foam 14

extinguishes a fire 17. The rate V3 of filling the inter-deck space with foam is determined by the known productivity Q of the source of foam and the area of the longitudinal section of the formwork,

0 equal to the product of the distance between the front 1 and rear 2 walls and the width of the excavation. The speed V4 of movement of the forms and is determined by the speed of movement of the vehicle 8. When comparing the speeds of V3 and Od, the condition must be met. This ensures that the foam 14 is in the inter-deck space of the formwork 3 under excessive pressure, which facilitates the penetration of the foam into hard-to-reach areas of the storage space.

Claims (1)

The invention of the method of extinguishing a fire in a mining process, including connecting a pipeline, one end of which is assembled with corrugations, to a source of foam and remote laying of a pipeline to a fire hoch with simultaneous supply of foam, with so that the purpose of increasing the effectiveness of fire extinguishing by providing intensive foam wetting of the whole production cross-section, before laying the pipeline in 5, formwork is erected, the walls of which are arranged to supply foam to its outer surface oriented towards the fire center, and the corrugated end of the pipeline is connected to the formwork, while the pipeline is laid simultaneously with the formwork moving, and foam is supplied to the interdestruction space at a speed greater than the speed of the formwork. H- 68 hr Fiz, 1 ЈN t-i o to Oj en 00 I CO