Composite gel anti-fire extinguishing material for coal seam fire control

Abstract

The invention discloses a composite gel anti-fire extinguishing material for preventing and controlling coal mine fires, which is composed of water glass base material, coagulation accelerator, composite aggregate and thickener materials. The added thickener can increase the consistency of the colloid and improve the suspension of the mixed slurry. The composite gel has a simple preparation process and is easy to apply on site; the formed gel has a certain strength and can play a plugging role; the source of raw materials is abundant and the price is low; the product is non-toxic, harmless and tasteless, does not pollute underground mines, and is harmless to the human body Toxic and side effects have obvious market application prospects.

Description

technical field [0001] The invention belongs to coal mine fire prevention and extinguishing materials, in particular to a composite gel material for coal mine fire prevention and control in coal mines. Background technique [0002] The spontaneous combustion conditions of coal mines in my country are complex, and the mines that spontaneously ignite and ignite have a wide range and a large number, which seriously threatens the personal safety of mines and miners and causes huge losses to the country. When the coal seam spontaneously combusts, it decomposes and oxidizes at high temperature and releases a large amount of toxic and harmful gases; at the same time, the high temperature promotes the release of gas contained in the coal seam, which may cause a gas explosion. Therefore, the coal seam spontaneous combustion is extremely harmful and must be extinguished quickly and thoroughly fire. [0003] Leakage sealing technology is more effective for fire prevention, but when it...

AI Technical Summary

Problems solved by technology

The use of inert gas foam fire prevention technology can reduce the temperature, reduce air leakage, and reduce the oxygen concentration in the gob, but the inert foam is injected into the crushed coal, and the foaming performance is poor, the bubble ratio is low, and the cost is high

The anti-fire extinguishing technology of chemical inhibitor also has a certain fire prevention effect, but when the temperature rises and the moisture absorbed by the inhibitor evaporates, its inhibitory effect will disappear, and the inhibitor that loses moisture will promote the recombination of coal and oxygen, and promote The speed of coal-oxygen recombination is accelerated, making coal more prone to spontaneous combustion

In addition, underground spontaneous combustion fires are usually located at a relatively high position on the top of the working face or roadway. When water or mud is used to extinguish the fire, it cannot stay at the fire site. After flowing through the fire site, the temperature of the coal surface is only reduced, and the internal temperature of the coal body is still high. For example, the preparation process of the yellow mud grouting material is simple, the material is convenient, and the cost is low, but after the mud is dehydrated, it cannot fully fill the cracks, the effect of plugging the air is poor, and the amount of loess is large; in addition, water can promote the spontaneous combustion of coal to a certain extent. When water will participate in the combustion reaction, a large amount of water gas will be produced, causing the water gas to explode

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