RU1788287C - Method for prevention of spontaneous fires in loosened coal aggregates - Google Patents

Abstract

SUMMARY OF THE INVENTION: In loosened coal accumulations PB give a refrigerant, for example liquid nitrogen or carbon dioxide, with a periodicity not exceeding the minimum incubation period of spontaneous combustion. 1 s.p. f-ly, 1 ill.

Description

:: The invention relates to the mining industry, in particular to methods for preventing endogenous fires in coal accumulations.

A method is known for preventing endogenous fires in loosened coal accumulations located in permafrost regions, including the use of a natural factor of freezing and periodic supply of heated air.

The use of this method is limited only to areas of the Far North.

The closest technical solution, selected as a prototype, is a method for preventing endogenous fires in coal and rock-coal accumulations, which involves injecting flame retardant solutions through perforated pipes.

. The disadvantage of this method is the low efficiency of the prophylactic treatment of the coal cluster.

The purpose of the invention is to increase the effectiveness of the prevention of endogenous fires in loosened clusters.

The goal is achieved by the fact that in a known method, including the use of substances that inhibit the process of ignition of coal in a large Coruie Wfl with a frequency not exceeding the incubation period of spontaneous combustion, a refrigerant is supplied.

The drawing shows a general view of a coal cluster for prophylactic treatment.

In coal stack 1, slopes 2 are the main sources of endogenous fires due to the impossibility of their high-quality compaction. Preventive treatment of the slopes is carried out by a refrigerant, the injection of which is carried out by means of perforated pipes 3, introduced into the loosened rock mass and placed in a checkerboard pattern at a distance of 1.5-2.0 m from each other. In quality

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In addition to refrigerant, liquid nitrogen or carbon dioxide can be used.

Preventive treatment of coal slopes is carried out with a frequency not exceeding the incubation period of spontaneous combustion of coal.

The proposed method for preventing endogenous fires in loose coal accumulations is carried out as follows. After forming the coal stack and installing the perforated pipes into the slopes to a depth of 0.8-1.0 m, pressure hoses connected to the cylinders or to a special vehicle with compressed refrigerant are connected to them. Refrigerant injection can be carried out separately in each perforated pipe or simultaneously through several pipes combined into a common system. According to laboratory tests, the amount of refrigerant supplied is between 80 and 100 liters per liter. 1 m3 of coal, controlled by flow meters or visually by the appearance of frost on the treated slope surface. Preventative frequency

processing slopes of coal stacks with refrigerant must correspond to the incubation period of coal spontaneous combustion. The countdown of a new incubation period must be started after complete thawing of the slopes.

The proposed method is characterized by extreme simplicity. implementation, allows to increase the efficiency of preventive maintenance and reduce the endogenous fire hazard of loosened coal accumulations.

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Claims (1)

1, a method of preventing endogenous fires in loosened coal clusters, including the supply to the last substances that inhibit the process of ignition of coal, igniting and so that, in order to increase the effectiveness of prevention, coal accumulations with a periodicity not exceeding the incubation period of spontaneous combustion supply refrigerant. 2; The method according to p. 1, about t and h and yu and with the fact that as a refrigerant use liquid nitrogen or carbon dioxide.