Temperature-controlled release type retardation foam for inhibiting spontaneous combustion of coal, its release system and preparation method

Abstract

The invention discloses temperature control release type inhibition foam for suppressing coal spontaneous combustion as well as a release system and a preparation method thereof, and belongs to the field of coal spontaneous combustion fire prevention. The raw material of the temperature control release type inhibition foam for suppressing coal spontaneous combustion comprises a basic reactant a, abasic reactant b, a foaming agent, a foam stabilizer, a compatible inhibitor and water, wherein the basic reactant a is soluble carbonate and / or soluble bicarbonate, and the basic reactant b is acid.In the release system, the A shell and B shell in a container are buckled to form a closed cavity for containing the temperature control release type inhibition foam raw materials that suppress coalspontaneous combustion, and a temperature-sensitive barrier is arranged at the buckling butt joint surface. The release system controls the contact and reaction of the raw materials at the initial stage of coal spontaneous combustion, generates inert gas and the inhibitor, and releases an inhibitor solution in the form of foam, the system has a targeted effect on a coal body with increased temperature and signs of spontaneous combustion, the inhibition efficiency and the scope of the inhibition are improved greatly, and the precise and efficient suppression of coal spontaneous combustion can be achieved.

Description

technical field [0001] The invention belongs to the technical field of coal spontaneous combustion fire prevention and particularly relates to a temperature-controlled release type retardation foam for inhibiting coal spontaneous combustion, a release system and a preparation method thereof. Background technique [0002] In the process of coal mining, the spontaneous combustion of residual coal in the goaf has always been one of the main disasters that threaten the safety of mine production. In order to prevent the spontaneous combustion of residual coal in the goaf, injecting or spraying inhibitors into the goaf is the main measure to inhibit the spontaneous combustion of coal . Traditional physical inhibitors, such as sodium chloride solution, magnesium chloride solution, calcium chloride solution, ammonium chloride solution, etc., are widely used in coal mines because of their low cost, wide range of sources, simple process and good inhibitory effect. This type of inhibi...

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Problems solved by technology

In order to solve the above problems, measures such as multiple spraying and aerosol spraying with gas as the carrier are mainly adopted at present, which have achieved certain effects, but the effect is limited

In addition, there are some solutions that study a microcapsule inhibitor made of a temperature-sensitive coating to wrap the inhibitor. After the residual coal in the gob is oxidized and self-heated to a certain temperature, the coating dissolves. The release of inhibitors can specifically suppress the spontaneous combustion of coal bodies, but the range of action of the released solid or liquid inhibitors is extremely limited and cannot fully contact with coal bodies, which has certain limitations

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