A fire prevention and extinguishing material and fire extinguishing method for goaf areas

Abstract

This invention relates to the field of fire prevention and extinguishing technology in goaf areas, and proposes a fire prevention and extinguishing material and method for goaf areas. The fire prevention and extinguishing material comprises the following raw materials in parts by weight: 60-80 parts water, 50-60 parts fly ash, 15-25 parts calcium carbide sludge, 5-10 parts polyethylene glycol, 10-20 parts polyacrylamide, 15-20 parts flame retardant, and 2-8 parts imidazole ethanol. This technical solution solves the problem of poor flame retardancy and protective properties of existing goaf fire prevention and extinguishing materials.

Description

Technical Field

[0001] This invention relates to the field of fire prevention and extinguishing technology in goaf areas, specifically to a fire prevention and extinguishing material and a fire extinguishing method for goaf areas. Background Technology

[0002] Fires pose a significant threat to mine safety, and they can easily trigger gas and coal dust explosions. Therefore, fire prevention in coal mines is of paramount importance. Among these fire accidents, those occurring in goaf areas are the most common. Goaf areas contain a large amount of loose coal, and the heat generated by the interaction of coal and oxygen is not easily dissipated, gradually accumulating. Once spontaneous combustion occurs, the large amount of heat stored in the goaf causes the temperature of the surrounding coal and rock mass to rise simultaneously.

[0003] Currently, common technologies and processes for mine fire prevention and extinguishing include stripping, water injection, drilling, grouting, and covering. Grouting is the most commonly used method, involving injecting a mixture of mud, fly ash, and water into the coal seam in the goaf to encase the coal and isolate it from the air. However, during the fire prevention and extinguishing process, the protective layer is prone to water loss and cracking, reducing its effectiveness. Therefore, how to prepare fire prevention and extinguishing materials for goafs with high flame retardancy and protective properties is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] This invention proposes a fire prevention and extinguishing material and a fire extinguishing method for goaf areas, which solves the problem of poor flame retardancy and protective properties of fire prevention and extinguishing materials in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] This invention proposes a fire prevention and extinguishing material for goaf areas, comprising the following raw materials in parts by weight: 60-80 parts water, 50-60 parts fly ash, 15-25 parts calcium carbide sludge, 5-10 parts polyethylene glycol, 10-20 parts polyacrylamide, 15-20 parts flame retardant, and 2-8 parts imidazole ethanol.

[0007] As a further technical solution, the mass ratio of polyacrylamide to imidazole ethanol is 2~6:1.

[0008] As a further technical solution, the mass ratio of polyacrylamide to imidazole ethanol is 5:1.

[0009] As a further technical solution, the flame retardant includes one or more of aluminum hydroxide, magnesium hydroxide, and zinc borate.

[0010] As a further technical solution, the flame retardant is composed of aluminum hydroxide and zinc borate.

[0011] As a further technical solution, the mass ratio of aluminum hydroxide to zinc borate is 1~3:1.

[0012] In this invention, by limiting the mass ratio of aluminum hydroxide and zinc borate, the crack resistance and flame retardancy of fire-fighting materials are improved.

[0013] As a further technical solution, the fly ash particle size is 1~10μm.

[0014] In this invention, by limiting the particle size of fly ash to 1~10μm, the adhesion and water permeability of the fire extinguishing material are improved.

[0015] As a further technical solution, the polyethylene glycol includes one or more of polyethylene glycol 200, polyethylene glycol 400, and polyethylene glycol 600.

[0016] In this invention, by adding polyethylene glycol to the fire extinguishing material, the viscosity of the fire extinguishing material and the compatibility between the various materials are improved.

[0017] This invention also proposes a method for preparing fire-fighting materials for goaf areas, comprising the following steps:

[0018] S1. Mix water, polyethylene glycol and polyacrylamide evenly to obtain a premix;

[0019] S2. Fly ash, calcium carbide sludge, flame retardant and imidazole ethanol are added to the premix and stirred evenly to obtain fire-fighting material.

[0020] This invention also proposes a fire extinguishing method for fire prevention and extinguishing materials in goaf areas, which uses a pouring method to extinguish fires in areas of goaf that are prone to spontaneous combustion.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] 1. In this invention, by adding imidazole ethanol to the fire-resistant and extinguishing material, the flame retardancy and protective properties of the fire-resistant and extinguishing material are improved, thus solving the problem of poor flame retardancy and protective properties of the fire-resistant and extinguishing material.

[0023] 2. In this invention, by limiting the mass ratio of polyacrylamide to imidazole ethanol to 2~6:1, the flame retardancy and protective properties of fire-fighting materials are further improved, thus better solving the problem of poor flame retardancy and protective properties of fire-fighting materials. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] In the following examples and comparative examples:

[0026] Fly ash: particle size 1~10μm, purchased from Shijiazhuang Hualang Mineral Products Trading Co., Ltd.;

[0027] Carbide sludge: 30% moisture content, purchased from Nanjing Hongqian Environmental Protection Engineering Co., Ltd.

[0028] Example 1

[0029] A method for preparing fire prevention and extinguishing materials for goaf areas includes the following steps:

[0030] S1. Mix 60 parts water, 5 parts polyethylene glycol 200 and 13 parts polyacrylamide evenly to obtain a premix;

[0031] S2. Add 50 parts fly ash, 15 parts calcium carbide sludge, 7.5 parts aluminum hydroxide, 7.5 parts zinc borate, and 8 parts imidazole ethanol to the premix and stir evenly to obtain the fire-fighting material.

[0032] Example 2

[0033] A method for preparing fire prevention and extinguishing materials for goaf areas includes the following steps:

[0034] S1. Mix 70 parts water, 8 parts polyethylene glycol 400 and 13 parts polyacrylamide evenly to obtain a premix;

[0035] S2. Add 55 parts fly ash, 20 parts calcium carbide sludge, 12 parts aluminum hydroxide, 6 parts zinc borate, and 8 parts imidazole ethanol to the premix and stir evenly to obtain the fire-fighting material.

[0036] Example 3

[0037] A method for preparing fire prevention and extinguishing materials for goaf areas includes the following steps:

[0038] S1. Mix 80 parts water, 10 parts polyethylene glycol 600 and 13 parts polyacrylamide evenly to obtain a premix;

[0039] S2. Add 60 parts fly ash, 25 parts calcium carbide sludge, 15 parts aluminum hydroxide, 5 parts zinc borate, and 8 parts imidazole ethanol to the premix and stir evenly to obtain the fire-fighting material.

[0040] Example 4

[0041] The only difference between this embodiment and Example 3 is that the polyacrylamide is 19 parts and the imidazole ethanol is 2 parts.

[0042] Example 5

[0043] The only difference between this embodiment and Example 3 is that the polyacrylamide is 14 parts and the imidazole ethanol is 7 parts.

[0044] Example 6

[0045] The only difference between this embodiment and Example 3 is that the polyacrylamide is 17.5 parts and the imidazole ethanol is 3.5 parts.

[0046] Example 7

[0047] The only difference between this embodiment and Example 3 is that the polyacrylamide is 18 parts and the imidazole ethanol is 3 parts.

[0048] Comparative Example 1

[0049] The only difference between this comparative example and Example 3 is that polyacrylamide and imidazole ethanol were not added.

[0050] Comparative Example 2

[0051] The only difference between this comparative example and Example 3 is that no polyacrylamide was added.

[0052] Comparative Example 3

[0053] The only difference between this comparative example and Example 3 is that imidazole ethanol was not added.

[0054] The flexural strength of the fire-fighting materials for goaf prepared in Examples 1-7 and Comparative Examples 1-3 was tested using the test method in GB 175-2007 "General Silicate Cement", and the flame retardant performance was tested using the test method in MT / T 113-1995 "General Test Methods and Judgment Rules for Flame Retardancy and Antistatic Properties of Polymer Products Used in Coal Mines".

[0055] Table 1. Performance test results of fire prevention and extinguishing materials in goaf areas in Examples 1-7 and Comparative Examples 1-3

[0056]

[0057] Compared with Example 3, Comparative Example 1 did not add polyacrylamide and imidazole ethanol, Comparative Example 2 did not add polyacrylamide, and Comparative Example 3 did not add imidazole ethanol. The results showed that the flaming and non-flaming burning times of the fire-resistant materials prepared by Comparative Examples 1 to 3 were longer than those of Example 3, and the flexural strength was lower than that of Example 3. This indicates that the simultaneous addition of polyacrylamide and imidazole ethanol can shorten the flaming and non-flaming burning times of the fire-resistant materials and enhance their flexural strength.

[0058] Compared with Example 3, Examples 4-7 changed the mass ratio of polyacrylamide and imidazole ethanol. As a result, the flame-on and flameless burning times of the fire-resistant materials prepared in Examples 3 and 4 were longer than those in Examples 5-7, and the flexural strength was lower than that in Examples 5-7. This indicates that when the mass ratio of polyacrylamide to imidazole ethanol is 2-6:1, the flame-on and flameless burning times of the fire-resistant materials can be further shortened and the flexural strength can be enhanced.

[0059] Comparing Examples 5-7, it was found that the flaming and non-flaming burning times of Example 6 were shorter than those of Examples 5 and 7, while the flexural strength was higher than that of Examples 5 and 7. This indicates that when the mass ratio of polyacrylamide to imidazole ethanol is 5:1, the resulting fire extinguishing material has the shortest flaming and non-flaming burning times and the strongest flexural strength.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fire prevention and extinguishing material for goaf areas, characterized in that, The raw materials include the following components by weight: 60-80 parts water, 50-60 parts fly ash, 15-25 parts calcium carbide sludge, 5-10 parts polyethylene glycol, 10-20 parts polyacrylamide, 15-20 parts flame retardant, and 2-8 parts imidazole ethanol. The mass ratio of polyacrylamide to imidazole ethanol is 2~6:

1.

2. The fire prevention and extinguishing material for goaf areas according to claim 1, characterized in that, The flame retardant includes one or more of aluminum hydroxide, magnesium hydroxide, and zinc borate.

3. The fire prevention and extinguishing material for goaf areas according to claim 2, characterized in that, The flame retardant is composed of aluminum hydroxide and zinc borate.

4. A fire prevention and extinguishing material for goaf areas according to claim 3, characterized in that, The mass ratio of aluminum hydroxide to zinc borate is 1~3:

1.

5. A fire prevention and extinguishing material for goaf areas according to claim 1, characterized in that, The fly ash particle size is 1~10μm.

6. The fire prevention and extinguishing material for goaf areas according to claim 1, characterized in that, The polyethylene glycol includes one or more of polyethylene glycol 200, polyethylene glycol 400, and polyethylene glycol 600.

7. A method for preparing a fire-fighting material for goaf areas according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Mix water, polyethylene glycol and polyacrylamide evenly to obtain a premix; S2. Fly ash, calcium carbide sludge, flame retardant and imidazole ethanol are added to the premix and stirred evenly to obtain fire-fighting material.

8. A fire extinguishing method for a fire-fighting material for a goaf area according to any one of claims 1 to 6, characterized in that, Fires in the goaf prone to spontaneous combustion are extinguished by injection.

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