A kind of multifunctional liquid foam used in underground coal mine and its application method

Abstract

The invention belongs to the technical field of coal mine safety, and patricianly relates to multifunctional liquid foam used for an underground coal mine and a using method of the multifunctional liquid foam. The multifunctional liquid foam used for the underground coal mine comprises, by mass, 0.5-10% of crystal whisker stopping agents, 0.5-30% of quaternary ammonium salt cationic surface active agents, 0.5-30% of non-ionic surface active agents and 0-10% of additives, the balance of water. The multifunctional liquid foam preparation method and using method are simple, bring convenience for use and manual operation, and are strong in applicability because of being suitable for mines rich in acid gases like sulfuretted hydrogen and sulfur dioxide, tunnels with large coal spontaneous combustion tendency, mine working faces and the like and particularly suitable for mine goaves.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a multifunctional liquid foam used in underground coal mines and an application method thereof. Background technique [0002] Underground coal mines often contain acid gases such as hydrogen sulfide or sulfur dioxide. They have a strong pungent smell, are highly toxic to the human body, are flammable and explosive, and will corrode underground machinery and equipment. Therefore, removing acid gases underground is important for improving the working environment of workers , It is of great significance to increase the safety of mine operations. At present, the main means of removing hydrogen sulfide and other acid gases in mines are to establish an independent ventilation system to dilute or pump hydrogen sulfide, and to infuse or spray hydrogen sulfide absorption solution. The first method is not ideal for goafs with high hydrogen sulfide content. The second ...

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Problems solved by technology

At present, the main means of removing hydrogen sulfide and other acid gases in mines are to establish an independent ventilation system to dilute or pump hydrogen sulfide, and to infuse or spray hydrogen sulfide absorption solution. The first method is not ideal for goafs with high hydrogen sulfide content. The second way is that the injection distance of the liquid absorbent is short, and the spraying is greatly affected by the spatial layout. The liquid is not easy to stay in the gaps of the goaf, and it is easy to flow away. The stabilization time is short and the loss is large.

[0003] The use of inhibitors to prevent spontaneous combustion of coal is an effective technology being used at home and abroad. The traditional method of using inhibitors is generally to inject or directly spray the inhibitor solution through drilling holes. Not ideal, because after the liquid is injected, the residence time is short, it is easy to flow away, the loss is large, and the utilization rate is low

For example, the patent of application number CN200910116090.X mentioned that the FR-1 liquid resistance foam used to prevent spontaneous combustion of underground coal in mines is a kind of inhibitor with ideal effect. Its advantage is that the injection effect is better, and the injection The distance is long, the foam has a certain stability, no loss, the broken liquid covers the surface of the coal seam, can wet and adhere to the coal seam, and plays the role of oxygen barrier, chemical cooling, but this liquid foam does not remove hydrogen sulfide The effect of acid gas and so on, the foam stability needs to be further improved

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