Inorganic salt type inhibitor for preventing and controlling spontaneous combustion of residual coal in goaf of coal mine

Abstract

The invention discloses an inorganic salt type inhibitor for preventing and controlling spontaneous combustion of residual coal in a goaf of a coal mine, which belongs to the field of fire prevention and extinguishment in the goaf of the coal mine. The inorganic salt type inhibitor consists of sodium bicarbonate, calcium bicarbonate, calcium chloride, magnesium chloride, sodium chloride and zinc chloride according to a certain proportion by weight. The average inhibiting rate of the inorganic salt type inhibitor can achieve 85%, and the inhibiting effect is ideal. When in use, the inhibitor is covered on the surface of the residual coal in the goaf, thereby achieving the effects of preventing and controlling the spontaneous combustion of a coal layer in the region for a long time. The dusting method of the inorganic salt type inhibitor for fire prevention and extinguishment is safe and stable, the process flow is simple, the operation is convenient, the initial investment is low, and the using cost is relatively low. The fire prevention and extinguishment technology of the inorganic salt type inhibitor which has thermal instability and can release inert gas carbon dioxide has broad application prospects in the work of preventing and controlling the spontaneous combustion fire disasters of the coal layers. The inorganic salt type inhibitor is applicable to the fire prevention and extinguishment in the goaf of the coal mine.

Description

technical field [0001] The invention belongs to the field of fire prevention and extinguishing in goafs of coal mines. The invention relates to a fire-extinguishing and chemical retarder for underground goafs of coal mines, which has the function of absorbing heat and cooling down, and can simultaneously provide inert gas carbon dioxide for coal left in goafs, thereby reducing the oxidation rate and preventing spontaneous combustion of coal. It can be used for fire prevention and control in goaf during coal mining. Background technique [0002] my country is rich in coal resources, and its coal production and consumption rank among the top in the world, accounting for more than 85% of the total domestic primary energy production and consumption. However, spontaneous combustion in coal mines is very serious. According to the statistical analysis of the existing accident data in our country, fire accident is one of the main disasters in mines among many mine accidents. The r...

AI Technical Summary

Problems solved by technology

The process of pre-injecting water through the coal seam, spraying to the gob, spraying to the coal pillar cracks and broken zones of the coal wall, spraying to the high temperature and high risk area, and spraying in the coal storage bunker is too complicated, and it is a gel-type inhibitor. One, does not have the characteristics of inorganic salt inhibitors

[0007] The above two types of inhibitors have the disadvantages of low inhibition rate or high cost. In our country, the research on inorganic salt inhibitors that can absorb heat and cool down, and can thermally decompose to generate inert gas carbon dioxide has not yet been deeply studied and very much. good field application

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