A kind of resistance foam anti-fire extinguishing material and using method thereof

Abstract

A chemical resistance foam fire-proof material and its use method, comprising 80%-90% of water, 0.3%-3% of N,N-bishydroxyethyl dodecylamide, lauryl sulfuric acid in terms of mass percentage Sodium 0.2% ~ 8%, sodium dodecyl sulfate 0.1% ~ 6%, fatty alcohol polyoxyethylene ether sodium sulfate 0.1% ~ 3%, n-butanol 0.01% ~ 0.2%, and hydroxypropyl methylcellulose 0.01% to 0.5%. The material consumption of the present invention is small, which solves the problem of inconvenient roadway transportation, and can quickly seal more air leakage areas with a small amount of material, thereby gaining valuable time for mine disaster control and preventing the rapid heating of the coal seam in the early stage of spontaneous combustion. The effect of burning. When in use, mix evenly with water that is 20 to 100 times the mass of the retarded foam fire extinguishing material, and use foaming equipment to foam 60 to 120 times. The expanded volume can quickly seal the broken coal cracks in the goaf.

Description

technical field [0001] The invention belongs to the field of fire prevention and control of coal seams, in particular to the field of fire prevention and control of gobs, and relates to a chemical-resistance foam anti-fire extinguishing material and a use method thereof. Background technique [0002] Oxidation reactions will occur in the remaining coal in the goaf during the mining process of the mine coal mining face, especially in coal seams with high density of thermophilic bacteria or coal seams containing pyrite. When the mining speed slows down, the CO concentration will increase. The main reason is that the insufficient reaction of coal and oxygen causes oxidation exotherm, bacteria or pyrite accelerates the reaction speed, and the heat accumulation speed is accelerated. If effective measures are not taken in time, it will be poisonous and harmful within a few days or more than ten days. The gas makes the miners unable to work normally, and the working face may be clo...

AI Technical Summary

Problems solved by technology

[0002] Oxidation reactions will occur in the remaining coal in the goaf during the mining process of the mine coal mining face, especially in coal seams with high density of thermophilic bacteria or coal seams containing pyrite. When the mining speed slows down, the CO concentration will increase. The main reason is that the insufficient reaction of coal and oxygen causes oxidation exotherm, bacteria or pyrite accelerates the reaction speed, and the heat accumulation speed is accelerated. If effective measures are not taken in time, it will be poisonous and harmful within a few days or more than ten days. The gas makes the miners unable to work normally, and the working face may be closed

After the working face is closed, a large amount of equipment cannot be taken out, and if the retention time is too long, it will be corroded and scrapped, which will bring great losses to mine production

After this phenomenon occurs in coal seams with a short spontaneous combustion period, the usual method is to reduce the air supply volume and speed up the mining speed, but the mining speed can be pushed when the production equipment is in good condition, and cannot be advanced when the production equipment fails.

When it cannot advance normally, water injection is used to cool down, and the method of relieving the temperature rise is used to reduce the release of toxic and harmful gases, but water is difficult to extinguish fires in high-level areas. After the broken coal cracks are washed by water flow, the air circulation is smoother. The fire changes more violently, and when water encounters residual coal in the high temperature area, H will be generated 2 and CO, H 2 And CO will explode when encountering high temperature, which is not conducive to mine safety production

[0003] There are also pressure injection N 2 or CO 2 Gas to suppress heating of fire zones, N 2 or CO 2 The gas has an inhibitory effect when it is continuously injected, but the gob area is large, and usually it can only be inhibited in a local area, and the effect on large-scale heating of the gob area is limited