SU1163005A1 - Method of erecting an isolated partition - Google Patents

Description

The invention relates to mining case and can be used in the isolation of mine workings, mainly in mines with a negative temperature, as well as for the construction of bridges in the isolation of underground fires.

There is a method of creating an ice insulating jumper, consisting in pre-installation in the cross-section of the mine workings of a tubular heat exchanger connected to the means of supplying the refrigerant and the coolant, supplying the refrigerant to the heat exchanger to freeze the water supplied to the surface of the CO · exchanger.

The disadvantages of this method are time consuming, labor and material resources for freezing the ice dam, as due to the lack of formwork, most of the water flows through the soil of the mine, and nitrogen gas is discharged into the isolated part of the mine workings. When the ventilation flow from the existing workings of the flow of water on the freezing increases due to the displacement of nitrogen gas by air flow.

Known methods for constructing jumpers using hardening chemical foams, for example, foams, consist in preparing and mixing components for producing foam plastic and injecting the resulting mixture into the inter-deck space [2G].

However, the known methods require the use of expensive chemical components and complex installations for the production of foam plastic and are not economically feasible for the construction of temporary jumpers.

The aim of the invention is to have ⁴ way of chewing.

This goal is achieved by the fact that, according to the method of erecting an insulating bridge, which includes installing the formwork, and injecting components that form a hardening foam into the inter-deck space, before the components are fed, the inter-deck space is frozen by supplying a low-temperature refrigerant into it, and suspensions and? liquid nitrogen, which are fed into the inter-deck space at the same time.

As foamed mineral suspensions, pulp from clay or inert dust or flotation waste is used.

The drawing shows the construction of an insulating jumper.

The scheme includes a lightweight sailing jumper 1 with excess valve 2, tank 3 transporting liquid nitrogen to the mine, pipeline 4 supplying a foam former solution ending with a perforated link 5, generator 6 inert foam (or foamed slurry), siphon sleeve 7 supplying liquid nitrogen to the inside deck space with pipe 8.

The method is as follows.

In mine workings, pre-fabricated sailboard formwork 1 is made of breathable fabric, pipeline 4 of the foaming agent is laid (or a shaft pipeline is used) with an inert foam generator 6 built in, the tank 6 for transporting liquid nitrogen is connected to the generator 6 and pipe 8 for supplying liquid nitrogen.

After the equipment is installed, the inside of the decking space is freezed by supplying liquid nitrogen (refrigerant), which in the air instantly turns into a gaseous state and creates a low-temperature space, which is controlled by the installed thermal sensor. Then through the pipeline 4 serves an aqueous solution of the foaming agent with simultaneous supply to the generator 6 of liquid nitrogen, which, falling into the stream of an aqueous solution of the foaming agent, due to intensive heat exchange with it passes into a gaseous state with the formation of cold foam fine-grained structure. Getting into the low-temperature space of the formwork, the foam, having a lower content of the liquid phase (with a foam multiplicity equal to 10–10 times smaller) than the water, quickly freezes. The rapid freezing of the foam also contributes to the cooling of the nitrogen foam obtained from liquid nitrogen having a temperature3

ru - 196 ° C. Cooling the water of the mine pipeline, which has an ambient temperature (~ 15 ° C), requires a lot of time and coolant consumption, which reduces the efficiency of 5 mine rescue operations while isolating emergency sections of the mines.

In the manufacture of an insulating bridge, an excess valve 2 and air permeability of the formwork fabric ensure the maintenance of the preset temperature inside the formwork space and the supply mode of liquid nitrogen.

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The use of the proposed method of building jumpers for isolating emergency areas provides

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increasing the efficiency of mine rescue operations during the elimination of underground fires. Under conditions of negative temperatures, bridges can be long-term, and at positive temperatures they are used as temporary ones, for example, in technological schemes, while reducing the boundaries of the fire department, when periodic construction of bridges and their destruction is required. In addition, the proposed method provides a reduction in emergency response time, an increase in the efficiency and safety of mine rescue operations with minimal economic costs.

Claims (2)

1. METHOD FOR CONSTRUCTING AND UNIQUE BANDS, including: installing formwork and injecting components that form a hardening foam into the inter-deck space, characterized in that, in order to reduce the cost of the process, before supplying the components that form a solid foam, the inter-shell space is frozen by feeding the bottom of the vessel into the bottom of the vessel. agent, and as components of the hardening foam use foamed mineral suspensions and liquid nitrogen, which are fed into the inter-deck space simultaneously. 2. The method of pop. 1, which is distinguished by the fact that pulp from clay or inert dust or flotation waste is used as foamed mineral suspensions. δΟΟδδΠ one 1163005 2