A material, preparation method and application method for preventing spontaneous combustion of floating coal in goaf

Abstract

The invention discloses a material capable of preventing float coal in a mine goaf from spontaneous combustion, and a preparation method and an application method thereof. The material capable of preventing the float coal in the mine goaf from spontaneous combustion is composed of gel powder, a thickening and water-retaining agent, an inorganic stabilizer, a dispersing and suspending agent and a flocculant, wherein the gel powder is a mixture of sodium alginate and high-water-absorbent resin; and the inorganic stabilizer is quartz powder. According to the invention, the quartz powder selected as the inorganic stabilizer has characteristics like stable chemical properties, high-temperature resistance, low thermal expansion coefficient, high insulation and corrosion resistance, so the addition of the quartz powder does not influence gel formation of the gel powder, but can improve high-temperature resistance of a gel.

Description

technical field

[0001] The invention belongs to the field of anti-fire extinguishing materials, and in particular relates to an anti-fire extinguishing material for preventing spontaneous combustion of floating coal in goafs in underground coal mines. Background technique

[0002] my country is rich in coal resources, with large and small coal fields all over the country. Coal is also the main energy source in my country at present, occupying a dominant position in the energy structure. With the rapid development of coal mining technology, the number of newly built and expanded mines and the increase of mining intensity and mining depth, the problem of mine fire prevention and extinguishing is particularly prominent, and the form of coal seam spontaneous combustion fire prevention and control is becoming more and more severe. According to past experience, as long as it is a coal seam face prone to spontaneous combustion, all existing fire prevention technical measures are bl...

Examples

Embodiment 1

[0024] The material for preventing spontaneous combustion of floating coal in gobs consists of 10 parts of a mixture of sodium alginate and cross-linked sodium polyacrylate (the mass ratio of sodium alginate to cross-linked sodium polyacrylate is 1:4), sodium carboxymethyl cellulose 2 75 parts of quartz powder, 10 parts of sodium bentonite, and 3 parts of polyacrylamide. Add the above raw materials into a dry mixer and mix for 5 minutes to obtain a uniformly dispersed powder product.

[0025] The method of use is to mix the finished powder product with water according to the water-to-material ratio of 15:1, and attach it to the surface of the coal seam in the form of pouring for the prevention and control of spontaneous combustion of the coal seam.

Embodiment 2

[0027] The material for preventing spontaneous combustion of floating coal in gobs consists of 35 parts of a mixture of sodium alginate and cross-linked sodium polyacrylate (the mass ratio of sodium alginate to cross-linked sodium polyacrylate is 1:4), sodium carboxymethyl cellulose 4 50 parts of quartz powder, 9 parts of sodium bentonite, and 2 parts of polyacrylamide. Add the above raw materials into a dry mixer and mix for 5 minutes to obtain a uniformly dispersed powder product.

[0028] The method of use is to mix the finished powder product with water according to the water-to-material ratio of 45:1, and spray it on the surface of the coal seam for the prevention and control of spontaneous combustion of the coal seam.

Embodiment 3

[0030] The material for preventing spontaneous combustion of floating coal in gobs consists of 50 parts of a mixture of sodium alginate and cross-linked sodium polyacrylate (the mass ratio of sodium alginate to cross-linked sodium polyacrylate is 1:4), sodium carboxymethyl cellulose 2 40 parts of quartz powder, 5 parts of sodium bentonite, and 3 parts of polyacrylamide. Add the above raw materials into a dry mixer and mix for 8 minutes to obtain a uniformly dispersed powder product.

[0031] The method of use is to mix the finished powder with water according to the water-to-material ratio of 80:1, and spray it on the surface of the coal seam for the prevention and control of spontaneous combustion of the coal seam.

technical field

[0001] The invention belongs to the field of anti-fire extinguishing materials, and in particular relates to an anti-fire extinguishing material for preventing spontaneous combustion of floating coal in goafs in underground coal mines. Background technique

[0002] my country is rich in coal resources, with large and small coal fields all over the country. Coal is also the main energy source in my country at present, occupying a dominant position in the energy structure. With the rapid development of coal mining technology, the number of newly built and expanded mines and the increase of mining intensity and mining depth, the problem of mine fire prevention and extinguishing is particularly prominent, and the form of coal seam spontaneous combustion fire prevention and control is becoming more and more severe. According to past experience, as long as it is a coal seam face prone to spontaneous combustion, all existing fire prevention technical measures are bl...

Examples

Embodiment 1

[0024] The material for preventing spontaneous combustion of floating coal in gobs consists of 10 parts of a mixture of sodium alginate and cross-linked sodium polyacrylate (the mass ratio of sodium alginate to cross-linked sodium polyacrylate is 1:4), sodium carboxymethyl cellulose 2 75 parts of quartz powder, 10 parts of sodium bentonite, and 3 parts of polyacrylamide. Add the above raw materials into a dry mixer and mix for 5 minutes to obtain a uniformly dispersed powder product.

[0025] The method of use is to mix the finished powder product with water according to the water-to-material ratio of 15:1, and attach it to the surface of the coal seam in the form of pouring for the prevention and control of spontaneous combustion of the coal seam.

Embodiment 2

[0027] The material for preventing spontaneous combustion of floating coal in gobs consists of 35 parts of a mixture of sodium alginate and cross-linked sodium polyacrylate (the mass ratio of sodium alginate to cross-linked sodium polyacrylate is 1:4), sodium carboxymethyl cellulose 4 50 parts of quartz powder, 9 parts of sodium bentonite, and 2 parts of polyacrylamide. Add the above raw materials into a dry mixer and mix for 5 minutes to obtain a uniformly dispersed powder product.

[0028] The method of use is to mix the finished powder product with water according to the water-to-material ratio of 45:1, and spray it on the surface of the coal seam for the prevention and control of spontaneous combustion of the coal seam.

Embodiment 3

[0030] The material for preventing spontaneous combustion of floating coal in gobs consists of 50 parts of a mixture of sodium alginate and cross-linked sodium polyacrylate (the mass ratio of sodium alginate to cross-linked sodium polyacrylate is 1:4), sodium carboxymethyl cellulose 2 40 parts of quartz powder, 5 parts of sodium bentonite, and 3 parts of polyacrylamide. Add the above raw materials into a dry mixer and mix for 8 minutes to obtain a uniformly dispersed powder product.

[0031] The method of use is to mix the finished powder with water according to the water-to-material ratio of 80:1, and spray it on the surface of the coal seam for the prevention and control of spontaneous combustion of the coal seam.