Composite gel inhibitor for preventing and controlling spontaneous combustion of coal in coal mine and preparation method thereof

Abstract

The invention relates to a composite gel inhibitor for preventing and controlling spontaneous combustion of coal in a coal mine and a preparation method thereof. The composite gel inhibitor provided by the invention comprises the following components in percentage by weight: 10 to 65.0 percent of graft copolymer, 0 to 4.00 percent of flame retardant, 20 to 60.0 percent of water glass, and the balance of water. The graft copolymer containing a -COOH functional group is obtained by adopting a water soluble polymer and unsaturated carboxylic acid monomers to perform graft copolymerization, and the composite gel inhibitor for preventing and controlling the spontaneous combustion of the coal in the coal mine is obtained by adding the flame retardant and the water glass into the graft copolymer. The flame retardant provided by the invention has the advantages of excellent retarding effect, environmental friendliness and the like.

Description

technical field [0001] The invention relates to a chemical inhibitor for preventing spontaneous combustion of coal in coal mines and a preparation method thereof, in particular to a polymer-inorganic composite inhibitor for preventing spontaneous combustion of coal in coal mines and a preparation method thereof. Background technique [0002] Coal spontaneous combustion, also known as coal spontaneous combustion, refers to the combustion phenomenon that occurs due to the temperature of coal rising due to the heat accumulation of coal itself in the absence of external heat sources. Spontaneous combustion of coal not only burns precious resources, but also produces a large amount of CO, CO 2 and SO 2 Toxic and harmful gases, pollute the environment, endanger people's health and life, and can also induce gas and coal dust explosion accidents, causing major economic losses. [0003] To prevent coal spontaneous combustion, in addition to reasonable and effective mining technolog...

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Problems solved by technology

[0005] 1) The adhesion of inorganic salt inhibitors on the solid coal surface is not strong, it is easy to lose, and the use efficiency is low. The silica gel inhibitors formed with water glass as the base material have a large amount of coagulant. When extinguishing a large-scale fire, the transportation of materials is extremely inconvenient, which hinders the fire-fighting process;

[0006] 2) Polyvinyl alcohol, sodium alginate, superabsorbent resins and polymer emulsion inhibitors can condense into a solid phase layer to cover the surface of the coal body, preventing and delaying the entry of oxygen into the coal body, and functioning as an oxygen barrier. However, the high polymer after film formation can also participate in the oxidation reaction at high temperature, and quickly loses the inhibition effect;

[0007] 3) The added strong oxidant destroys the active structure and groups in the coal body and reduces the quality of the coal. On the other hand, when the strong oxidants such as perchlorate, permanganate, and peroxide react with the coal body because Heat release, there is a safety hazard

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