RU37770U1 - TECHNOLOGICAL DIAGRAM OF THE SYSTEM FOR PRODUCING INSULATION WORKS AND EXTINGUISHING THE UNDERGROUND FIRE IN THE MINES - Google Patents

Description

Technological scheme of the system for the production of insulation and extinguishing an underground fire in a mine

A useful model of the device for the production of insulation works in a mine relates to mining and can be used to isolate emergency sites from existing mine workings.

A known method of isolating an emergency hitch during underground mining, including the construction of formwork in a mine along the path of a fire and the remote filing of aggregate into the interior formwork through a well drilled from a nearby formation or from the surface (ed. Certificate of the USSR No. 16668693, Cl E 21 F 5 / 00.1991 g.)

A known system of insulation work in a mine, containing a fire-irrigation pipeline, an underground gasifier for liquid nitrogen, an underground cement truck, a set of insulating structures, while the subsequent supply of insulating compositions is provided with gaseous nitrogen. The space of the double insulating jumper is equipped with two injection nozzles, slid in the space of the double insulating jumper along the length of the mine, (certificate of the Russian Federation No. 29342, Cl. 7 E 20 F 5/02, 2002)

A disadvantage of the known technical solutions is that their solutions predetermine the need for the early installation of formwork with a well or pipe supply for filler, there is no main fire-fighting train of execution.

The purpose of the utility model is to increase the efficiency of localization and suppression of underground fires and the safety of mine rescue operations during isolation and increase the sealing of emergency sections of the mine from existing workings by reducing material and labor costs for their production.

This is achieved by the fact that the mine uses the technological scheme of the insulation and fire extinguishing system in the mine, which contains a fire-irrigation pipeline, an underground gasifier for liquid nitrogen, an underground cement truck, a set of insulating structures, at Ashva, the subsequent supply of insulating compounds is provided by gaseous nitrogen.

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The system is additionally equipped with a sleeve for supplying nitrogen-chladone mixture vapors into the isolated space, the sleeve being connected from the bridge to the flange of the gas metering pipe of the isolated space, i the second end of the sleeve is fixed to the outlet pipe of the storage and delivery unit from the set of the insulating structure and connected to the underground gasifier supply of gaseous nitrogen for transporting liquid HFC 114B2 under excess pressure to an isolated space.

The proposed set of distinctive features allows through the use of an insulation work equipment system in a mine in the form of an underground liquid nitrogen gasifier, the KOPIR equipment set, which includes a slurry submersible pump with pneumatic drive ШППП1, an underground mine cement truck for transporting bulk materials, and a local fire and irrigation pipeline :

- Reliably seal the emergency section from existing mine workings;

-to extinguish an underground fire by vapors of a nitrogen-chladone mixture;

-to prepare, using the pump 11ShNP-1, filler pulp and cement slurry with a consistency of T: W 2: 1;

- provides mobility of the equipment system.

The figure shows the technological scheme of the insulation work system in the mine during isolation of the emergency site. The system contains the following types of equipment:

1-complex nitrogen energy KAE-1; 2-distributing collector of compressed gas; Z-set of equipment for the production of insulation works "COPIER; 4 fire and irrigation pipeline; 5-shaft cement truck ЦШ-1; 6-pump slurry submersible with pneumatic drive TTlllHll-1; 7-mine trolley VG-3.3; 8 anchor-sealer AG-2; 9-formwork prefabricated "SAIL; 10-outlet filler pipe pulp; 11-output branch pipe for feeding bulk material: 12-double jumper; 13-pipe gas metering; 14-hole pipe at the Sail; 15-flange of a gas metering pipe; 16-hose feed for silvers; 17-hose for supply of bulk material; 18- nitrogen-chladonic feed hose

 . . ; . .., - 3

19-pipe with a valve of the HFC 114B2 storage device; 20-unit for

Storage of Freon 114B2.

The entire equipment system works through the energy of an autonomous power source - an underground gasifier 1.

To isolate and seal the emergency section from the existing mine workings, a double insulating bridge with formwork -9 and “SAIL” is erected, which is equipped with two injection nozzles 10 and 11, respectively, for feeding clay pulp and dry filler in the form of fly ash transported to the site mine work 5 with self-unloading cement, by supplying compressed gaseous nitrogen from the gasifier 1. After the clay pulp has been prepared by the SHPP-pump with its engine driven from underground of the first gasifier 1, the clay pulp supply is turned on by 17, and by discharging the mixture into the double jumper space through the outlet pipes 10 and I, where the mixture is actively displaced and reliably fills the space. The end section is filled by introducing into the cement truck mixture up to 10% of the expandable mineral loose composite and up to 2% of the foaming agent. This is predetermined by the fact that the upper part of the formwork and its fracture is completely filled with the volume of foamed filler and reliably seals the emergency section. Additionally, by means of grouting machines of “anchor-sealers 8, the lateral rocks of coal and rocks are plugged, reaching complete sealing of the worked out space.

The technological system is additionally equipped with a sleeve for supplying nitrogen-HFC mixture vapors into the isolated space, the sleeve being connected from the bridge to the flange 15 of the gas metering pipe of the isolated space, and the second end of the sleeve is fixed to the outlet pipe 19 of the storage and dispensing apparatus from the isolation insulating kit 3 and connected to the underground gasifier 1, the supply of gaseous nitrogen for transporting liquid freon 114B2 under excess pressure in an isolated space.

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VNIIPO and RosNIIGD found that with a 5% dilution of air with nitrogen, the fire extinguishing efficiency of Freon 114B2 increases. Based on these studies, a combined gas composition (freon + nitrogen) for volumetric quenching was proposed.

We conducted a study on the effect of Freon 114B2 on the ignition region of methane-hydrogen-air mixtures when 10, 20, 30% of air is replaced with nitrogen. It was found that when diluting the air with nitrogen for every 10%, the consumption of Freon 114B2 decreases by about half. Moreover, with 30% replacement of air with nitrogen, the phlegmatizing concentration of Freon 114B2 is only 0.3%. The advantage of using a mixture of chladone with nitrogen over pure nitrogen is that the mechanism of phlegmatization of explosions and flame inhibition is based on chemical inhibition of the combustion reaction, and not just on the mechanical replacement of oxygen by nitrogen. The use of a mixture of nitrogen with chladone can significantly reduce the consumption of both phlegmatizers, without compromising efficiency.

The technical process for using these technological solutions was used to eliminate underground fires in many of the Kuznetsk coal basin’s coal mines, including the Abashchevskaya mine, the Capital mine AOUK Kuznetskugol mine, named after IN AND. Lenin and the mine "Usinsky OJSC" Mezhdurechensk Coal Company.

In contrast to the utility model, the underground system of a set of equipment for the production of insulation works in the mine, created at the RosNIIGD, which ensures the speed and safety of mine rescue operations during the elimination of complex underground fires, while reducing material and labor costs for their production, was included. Authors (S.A . Sharov ;;. V. Myachin / A.E. Chuprikov A.S. Golik

Claims (1)

The technological scheme of the insulation and fire extinguishing system in the mine, containing a fire-irrigation pipeline, an underground liquid nitrogen gasifier, an underground cement truck, a set of insulating structures, while the subsequent supply of insulating compositions is provided with gaseous nitrogen, characterized in that the system is additionally equipped with a supply hose into the isolated vapor space of the nitrogen-HFC mixture, while the sleeve is connected from the bridge to the flange of the gas metering pipe vannogo space and a second end secured to the sleeve outlet nozzle storage device and outputting a set of insulating constructions underground and connected to the gasifier supplying nitrogen gas for transporting the liquid refrigerant 114b2 pressurized in an isolated space.