A rapid-setting super-high-water cemented filling and fire prevention and extinguishing material, a preparation method and applications thereof

Abstract

The application discloses a rapid-setting super-high-water cemented filling and fire-preventing and extinguishing material, a preparation method and application, and comprises two components A and B, which are composed of the following raw materials in percentage by weight: the component A is composed of sulphoaluminate cement 30-40%, bauxite 30-35%, calcium sulphoaluminate 15-25%, a retarder 1-4%, borax 2-3%, alkali swelling thickening agent 0.5-1%, sodium lignosulfonate 1-5%; the component B is composed of gypsum 55-70%, lime 15-25%, a rapid-setting early-strength agent 4-12%, hydroxypropyl methyl cellulose 1-2% and guar gum 5-7%. The filling and fire-preventing and extinguishing material can realize initial setting within 1-10 minutes under the condition of high water-cement ratio, has high water-solidification rate, and has certain compressive and bearing capacity, overcomes the defects of high reaction temperature and high cost of organic filling materials and slow solidification and low strength of traditional inorganic filling materials, reduces the setting time of the material, and avoids the pollution to the environment and the health hazards to construction personnel.

Description

Technical Field

[0001] This invention relates to the field of high-water-rate-setting fire extinguishing materials, specifically to a high-water-rate-setting, ultra-high-water-rate-setting cementitious filling and fire extinguishing material, its preparation method, and its application. Background Technology

[0002] High-water-rate quick-setting material (hereinafter referred to as high-water material) is an inorganic cementitious material developed in the 1980s. It is a new type of pumpable support material that is easy to use, inexpensive, and has certain mechanical properties.

[0003] Polymer-based filling materials have been banned in many markets due to their exothermic reaction and flammability. Inorganic high-water gel materials have taken their place. High-water materials are usually composed of two components, A and B. Component A is generally composed of aluminate or sulfoaluminate cement sintering material, suspending agent, retarder, and dispersant. Component B is composed of gypsum, lime, and composite quick-setting, early-strength agents, and suspending and dispersing agents. The mass ratio of components A and B is generally 1:1. They are mixed separately with water at approximately the same water-cement ratio and then transported through pipelines to the filling location for mixing and solidification. Therefore, high-water materials can remain uncured for a long time, do not clog pipes, and can be pumped. The filling process is simple, and the solidification speed after mixing is fast. They can be used for mine support, filling, leak sealing, soil stabilization, flame retardant fire extinguishing, etc., and can replace wood and steel, showing broad application prospects.

[0004] Existing high-water-content materials have the following problems:

[0005] 1) Low water-cement ratio, high material consumption. Generally, the water-cement ratio of high water content materials is 2-3.5:1. The amount of material required per unit volume for underground filling is large, which increases the cost of use. Furthermore, during pumping, due to the low water-cement ratio, the slurry is more viscous, which can easily cause pipe blockage during pumping and use, and it is also not easy to diffuse in the goaf.

[0006] 2) Excessive setting time. The setting time of current high-water-cement materials is mostly 12-50 minutes, and it will be even longer as the water-cement ratio increases. The excessively slow gelation time causes the slurry to diffuse too quickly in the goaf, and its fluidity is too good, making it unable to effectively stay in the area that needs to be filled, ultimately resulting in excessive slurry loss.

[0007] 3) Low strength, poor filling effect, and poor pressure-bearing and compaction. When high-moisture materials fill the gaps in coal and rock, cracks will appear when they are subjected to excessive pressure, thus forming new air leakage channels.

[0008] For example, patent CN 103626452 A discloses an ultra-high water content filling material, which has the advantages of short initial setting time, high setting strength, and stable strength. The initial setting time is adjustable from 2 to 5 minutes, and the material is non-toxic, odorless, pollution-free, safe, and environmentally friendly. However, the maximum water-cement ratio of this solution can only be 10:1, and the cost is still relatively high. CN105503108A discloses a composite ultra-high water content filling material and its preparation method. This filling material is composed of equal volumes of slurry A and slurry B. Slurry A is composed of A1, A2, and water in a weight ratio of A1:A2:water = 1:0.05-0.20:3-11, and slurry B is composed of B1, B2, and water in a weight ratio of B1:B2:water = 1:0.05-0.20:3-11. The maximum water-cement ratio can be 11:1. However, this invention has a relatively long initial setting time, ranging from 20 to 60 minutes, and its composition consists of four components, making the process complex. CN112250406A discloses a high-water, high-strength filling material for mining and its preparation method. The material prepared by this invention has the characteristics of adjustable setting time from ten minutes to several hours and high compressive strength. However, the composite additives mentioned in the invention require ball milling, water bath, and other methods to prepare, which is complex, and the ratio of water to material is very small, at 1:1.5. Summary of the Invention

[0009] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a rapid-setting, ultra-high water-cement cementitious filling and fire-fighting material, its preparation method, and its application. Under high water-cement ratio conditions, it can achieve initial setting within 1-10 minutes, has a high water-solidification rate, and possesses certain compressive strength and load-bearing capacity. It overcomes the disadvantages of high reaction temperature and high cost of organic filling materials, and slow solidification and low strength of traditional inorganic filling materials. It reduces the setting time of the material and avoids environmental pollution and health hazards to construction workers.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] One object of the present invention is to provide a fast-setting, ultra-high water content cemented filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0012] Component A: 30-40% sulfoaluminate cement, 30-35% bauxite, 15-25% calcium sulfoaluminate, 1-4% retarder, 2-3% borax, 0.5-1% associative alkali-swelling thickener, and 1-5% sodium lignosulfonate;

[0013] Component B: 55-70% gypsum, 15-25% lime, 4-12% quick-setting and early-strength agent, 1-2% hydroxypropyl methylcellulose, and 5-7% guar gum.

[0014] Preferably, the retarder in component A includes one or a combination of sodium gluconate and glucose.

[0015] Preferably, the gypsum in component B includes any one or a combination of two or more of anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum.

[0016] Preferably, the quick-setting and early-strength agent in component B includes any one or a combination of two or more of sulfate, nitrate, fluorite, and quartz sand.

[0017] The second objective of this invention is to provide a method for preparing a rapid-setting, ultra-high water content cemented filling and fire-extinguishing material, the preparation method comprising the following steps:

[0018] (1) Weigh the raw materials according to the proportion, and add sulfoaluminate cement, bauxite, calcium sulfoaluminate, retarder, borax, associative alkali swelling thickener and sodium lignosulfonate to the powder mixing tank according to the proportion. Mix evenly and set aside to obtain component A.

[0019] (2) Weigh the raw materials according to the proportion, and add gypsum, lime, quick-setting agent, hydroxypropyl methylcellulose and guar gum to the powder mixing tank according to the proportion. Mix evenly and set aside to obtain component B.

[0020] The third objective of this invention is to provide an application of a fast-setting, ultra-high water content cemented filling and fire-extinguishing material in coal fire prevention. The application method includes the following steps: mixing components A and B with water at a water-cement ratio of 6-20:1 for 3-5 minutes to obtain slurries A and B; then pumping the prepared slurries A and B at a ratio of 1:1 into pipelines for mixing, and then transporting them to a designated area through pipelines.

[0021] Preferably, the ratio of component A to water is consistent with the ratio of component B to water.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. Short initial setting time; Under the condition of ensuring a high water-cement ratio, the material of this invention can still form a large number of ettringite crystal nuclei in a short time, forming a needle-like or spatial network structure, and the initial setting time is kept within 10 minutes.

[0024] 2. High water retention performance; the material of this invention maintains high water retention even under high water-cement ratio conditions, with a water retention rate of over 95%; through borax in component A and guar gum in component B, these two substances can not only be used as retarder and suspending dispersant respectively, but also react to form a gel, retaining more water, thereby achieving rapid initial setting and high water retention of the high water content material; at the same time, after adding an associative alkali-swelling thickener, it has a suspending and dispersing effect in solution A, and after mixing solutions A and B, it associates in an overall alkaline environment, and after the reaction, it has a significant thickening and water retention effect, further improving the water retention capacity of the ultra-high water content material;

[0025] 3. High compressive strength; the grout with low initial viscosity has good diffusion and permeability after being injected into the fractured coal and rock mass and goaf. While ensuring high water retention, it can form a dense solid with the coal body. It has high compressive strength, good filling effect, and is compact under pressure, with good sealing performance.

[0026] 4. Low usage and low cost: The water-cement ratio of the material can reach up to 20:1, and its high water retention capacity increases water consumption while reducing material usage, thereby reducing the cost per unit area. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 The following is a test result of the water retention performance of the quick-setting ultra-high water content cemented filling and fire extinguishing material in Example 1. (a) is a picture of the state of the material solidified body after continuous flame burning, and (b) is a picture of the state after burning for 2 minutes. The material has extremely strong water retention and thermal stability. It does not crack or collapse after being baked by flame and has a low water loss rate.

[0029] Figure 2 The graph shows the test results of the stacking performance of the quick-setting ultra-high water content cemented filling and fire-extinguishing material in Example 1. The mixed slurry flowed down from a height and the natural angle of repose was measured to be about 40°, indicating good stacking performance.

[0030] Figure 3 This is the state of the quick-setting ultra-high water content cemented filling and fire-extinguishing material after it has penetrated into the coal body in Example 1. After the mixed slurry enters the coal and rock mass and the goaf, it has good diffusion and penetration performance, forming a high water content solidified body with excellent sealing performance.

[0031] Figure 4This is a comparison of the setting time and water content curves of the rapid-setting ultra-high water content cemented filling and fire-extinguishing material in Example 2 under different water-cement ratios.

[0032] Figure 5 This is a comparison of the setting time and water-solidification rate curves of the fire-fighting materials used in Example 2 and Comparative Examples 1-3 under different water-cement ratios. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The alkali-swellable thickeners used in the embodiments of the present invention include alkali-swellable thickener CB-1076 produced by Guangzhou Wanjun Chemical Technology Co., Ltd., Yakulong 250HBR associative alkali-swellable thickener, and alkali-soluble polyurethane associative thickening powder produced by Shenzhen Yoshida Chemical Co., Ltd.

[0035] Example 1

[0036] A rapid-setting, ultra-high water content cementitious filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0037] Component A: 39.5% sulfoaluminate cement, 32% bauxite, 19.5% calcium sulfoaluminate, 2% sodium gluconate, 1% glucose, 3% borax, 0.5% alkali-swelling thickener CB-1076, and 2.5% sodium lignosulfonate.

[0038] Component B: 33% hemihydrate gypsum, 37% anhydrous gypsum, 20% lime, 2% potassium nitrate, 2% sodium sulfate, 1% hydroxypropyl methylcellulose, and 5% guar gum.

[0039] During construction, the water-to-material A ratio is prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively, and the water-to-material B ratio is also prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively. The ratio of component A to water is consistent with the ratio of component B to water. After stirring the A and B aqueous solutions for 3 minutes each, they are mixed in the pipeline and pumped to the work area.

[0040] Example 2

[0041] A rapid-setting, ultra-high water content cementitious filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0042] Component A: 38% sulfoaluminate cement, 32.5% bauxite, 20.5% calcium sulfoaluminate, 2% sodium gluconate, 1% glucose, 3% borax, 0.5% associative alkali-swelling thickener 250HBR, and 2.5% sodium lignosulfonate.

[0043] Component B: 31.5% hemihydrate gypsum, 36% anhydrous gypsum, 21% lime, 2.5% potassium nitrate, 2.5% sodium sulfate, 1% hydroxypropyl methylcellulose, and 5.5% guar gum.

[0044] During construction, the water-to-material A ratio is prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively, and the water-to-material B ratio is also prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively. The ratio of component A to water is consistent with the ratio of component B to water. After stirring the A and B aqueous solutions for 3 minutes each, they are mixed in the pipeline and pumped to the work area.

[0045] Example 3

[0046] A rapid-setting, ultra-high water content cementitious filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0047] Component A: 36.5% sulfoaluminate cement, 33% bauxite, 22% calcium sulfoaluminate, 1.5% sodium gluconate, 1% glucose, 3% borax, 1% alkali-soluble polyurethane associative thickener, and 2% sodium lignosulfonate.

[0048] Component B: 26% hemihydrate gypsum, 38% anhydrous gypsum, 21% lime, 3% potassium nitrate, 3% sodium sulfate, 2% fluorite, 1% hydroxypropyl methylcellulose, and 6% guar gum.

[0049] During construction, the water-to-material A ratio is prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively, and the water-to-material B ratio is also prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively. The ratio of component A to water is consistent with the ratio of component B to water. After stirring the A and B aqueous solutions for 3 minutes each, they are mixed in the pipeline and pumped to the work area.

[0050] Example 4

[0051] A rapid-setting, ultra-high water content cementitious filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0052] Component A: 35% sulfoaluminate cement, 34% bauxite, 24% calcium sulfoaluminate, 1.5% sodium gluconate, 3% borax, 1% associative alkali-swelling thickener 250HBR, and 1.5% sodium lignosulfonate.

[0053] Component B: 22.5% hemihydrate gypsum, 38.5% anhydrous gypsum, 22% lime, 3.5% potassium nitrate, 2.5% fluorite, 3% quartz sand, 1.5% hydroxypropyl methylcellulose, and 6.5% guar gum.

[0054] During construction, the water-to-material A ratio is prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively, and the water-to-material B ratio is also prepared at 6:1, 8:1, 10:1, 15:1 and 20:1 respectively. The ratio of component A to water is consistent with the ratio of component B to water. After stirring the A and B aqueous solutions for 3 minutes each, they are mixed in the pipeline and pumped to the work area.

[0055] Comparative Example 1

[0056] A filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0057] Component A: 38% sulfoaluminate cement, 32.5% bauxite, 20.5% calcium sulfoaluminate, 3% sodium gluconate, 3% glucose, 0.5% associative alkali-swelling thickener 250HBR, and 2.5% sodium lignosulfonate.

[0058] Component B: 31.5% hemihydrate gypsum, 36% anhydrous gypsum, 21% lime, 2.5% potassium nitrate, 2.5% sodium sulfate, 1% hydroxypropyl methylcellulose, and 5.5% guar gum.

[0059] During construction, the water-to-material A mass ratio is 8:1, and the water-to-material B mass ratio is 8:1. After each of the A and B aqueous solutions is stirred for 3 minutes, they are mixed in the pipeline and pumped to the area to be worked.

[0060] Comparative Example 2

[0061] A filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0062] Component A: 38% sulfoaluminate cement, 32.5% bauxite, 20.5% calcium sulfoaluminate, 2% sodium gluconate, 1% glucose, 3% borax, 0.5% associative alkali-swelling thickener 250HBR, and 2.5% sodium lignosulfonate.

[0063] Component B: 33% hemihydrate gypsum, 36% anhydrous gypsum, 23% lime, 3% potassium nitrate, 3% sodium sulfate, and 2% hydroxypropyl methylcellulose.

[0064] During construction, the water-to-material A mass ratio is 8:1, and the water-to-material B mass ratio is 8:1. After each of the A and B aqueous solutions is stirred for 3 minutes, they are mixed in the pipeline and pumped to the area to be worked.

[0065] Comparative Example 3

[0066] A filling and fire-extinguishing material, comprising two components, A and B, composed of the following raw materials by weight percentage:

[0067] Component A: 38% sulfoaluminate cement, 32.5% bauxite, 20.5% calcium sulfoaluminate, 2% sodium gluconate, 1% glucose, 3% borax, and 3% sodium lignosulfonate.

[0068] Component B: 31.5% hemihydrate gypsum, 36% anhydrous gypsum, 21% lime, 2.5% potassium nitrate, 2.5% sodium sulfate, 1% hydroxypropyl methylcellulose, and 5.5% guar gum.

[0069] During construction, the water-to-material A mass ratio is 8:1, and the water-to-material B mass ratio is 8:1. After each of the A and B aqueous solutions is stirred for 3 minutes, they are mixed in the pipeline and pumped to the area to be worked.

[0070] The parameters to be tested after mixing the A and B slurries in Examples 1-4 and Comparative Examples 1-3 are: initial setting time under different water-cement ratios (the experimental temperature was 23±2℃, and the humidity was 50±5℃. The water used in the experiment was Grade III water as specified in GB / T6682-2008), water-solidification ratio, and compressive strength. The compressive strength was determined according to JG / T266-2011 Foamed Concrete 7.3.3, and the specific data of different tests are shown in Table 1.

[0071] The methods for testing initial setting time and water retention rate are as follows:

[0072] Instruments: Beaker: 250mL, stopwatch: 0.01s graduation, constant temperature water bath: 25±0.2℃, glass rod, electronic balance, graduated cylinder: 250mL.

[0073] Operating steps:

[0074] a) Weigh 100g of the materials from Examples 1-4 and Comparative Examples 1-3 using an electronic balance, pour them into a 250mL beaker containing water in the specified proportion, start the stopwatch at the same time, and continue stirring for about 10 seconds to ensure that the two are fully mixed.

[0075] b) Tilting the beaker at 45°, the initial setting time is when the mixed slurry completely loses its fluidity, in seconds.

[0076] c) Collect the water that has run off the surface of the mixed slurry due to the lack of solidification, measure its volume, and calculate the water-solidification ratio (%).

[0077] Table 1. Performance of Ultra-High Water Content Materials for Cemented Filling and Fire Extinguishing Materials in Examples 1-4 and Comparative Examples 1-3

[0078]

[0079] As shown in Table 1 and Figure 1-5 Experiments conducted on the rapid-setting, high-water-cement cementitious filling and fire-extinguishing materials provided in Examples 1-4 under different water-cement ratios show that the initial setting time after mixing gradually increases with the increase of the water-cement ratio, but the increase is not significant. At higher water-cement ratios, the initial setting time remains very short, and the water-solidification rate is very high. At lower water-cement ratios, the resulting material exhibits certain compressive strength and load-bearing capacity, while at higher water-cement ratios, it meets the requirements for rapid initial setting. This material meets the performance requirements for filling and fire extinguishing in coal mines, requires only a small amount, is pollution-free and odorless, and has broad application prospects.

[0080] Analysis of experimental results of this invention: The initial setting time of high-water-content materials depends on the formation rate of ettringite. In existing technologies, the formation rate of ettringite is relatively slow, resulting in a longer initial setting time. In the rapid-setting ultra-high-water-content cementitious filling and fire-extinguishing material of this invention, sulfoaluminate cement, bauxite, and calcium sulfoaluminate in component A, and gypsum and lime in component B, are the main components for forming ettringite. Under high water-cement ratio conditions, initial setting can be achieved within 1-10 minutes. The rapid-setting and early-strength agent in this invention exhibits a faster dissolution and ion diffusion rate after mixing components A and B. Therefore, it can form a large number of ettringite crystal nuclei in a shorter time, creating needle-like or spatial network structures, enabling rapid initial setting of the slurry after mixing. Hydroxypropyl methylcellulose acts as a dispersant and suspending agent in solution B, while also having a certain accelerating effect, reducing initial setting time. Sodium lignosulfonate in component A serves as both a dispersant and a retarder, preventing rapid thickening or gelation of solution A after water addition, facilitating later pumping. Furthermore, borax in component A and guar gum in component B, besides acting as retarder and suspending / dispersing agents respectively, can react to form a gel, retaining more water, thus achieving rapid initial setting and high water retention in high-water-content materials. A comparison of Example 2 and Comparative Examples 1-2 shows that when borax and guar gum are absent from the formulation, the water-solidification rate significantly decreases to 82.1%. (See the comparison chart.) Figure 5 Meanwhile, its initial setting time is extended to 190s, and its compressive strength is reduced to 0.31MPa.

[0081] Furthermore, the associative alkali-swellable thickener is innovatively applied to this type of material for the first time. After its addition, the associative alkali-swellable thickener has a suspending and dispersing effect in solution A. Simultaneously, after mixing solutions A and B, association occurs in an overall alkaline environment, resulting in significant thickening and water-retention effects, further improving the water retention capacity of the ultra-high water content material. A comparison of the results from Example 2 and Comparative Example 3 shows that when component A in the formulation does not contain the alkali-swellable thickener, its water-solidification rate decreases significantly, the setting time is as long as 205 seconds, and the compressive strength is also reduced. See the comparison chart below. Figure 5This invention overcomes the shortcomings of organic filler materials, such as high temperature and high cost, and traditional inorganic filler materials, such as slow solidification and low strength. It reduces the solidification time of materials and avoids environmental pollution and health hazards to construction workers.

[0082] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. The application of the rapid-setting super-high-water cemented filling and fire prevention and extinguishing material in the prevention and treatment of coal fires, characterized in that, The application method comprises the following steps: mixing and stirring the A component, the B component and water according to a water-cement ratio of 6-20:1 for 3-5 min to obtain A and B slurries; then pumping the prepared A and B slurries according to a ratio of 1:1, mixing in the pipeline, and conveying to the specified area through the pipeline; wherein The A component comprises 30-40% of sulphoaluminate cement, 30-35% of bauxite, 15-25% of calcium sulphoaluminate, 1-4% of a retarder, 2-3% of borax, 0.5-1% of an associated alkali swelling thickener, and 1-5% of sodium lignosulfonate. The B component comprises 55-70% of gypsum, 15-25% of lime, 4-12% of a quick-setting early-strength agent, 1-2% of hydroxypropyl methyl cellulose, and 5-7% of guar gum. The quick-setting early-strength agent in the B component is selected from any one or more than two combinations of sulphate, nitrate, fluorite, and quartz sand.

2. The use of the quick-setting super-high-water cemented filling and fire prevention and extinguishing material according to claim 1 in coal fire prevention, characterized in that, The retarder in the A component is selected from one or a combination of sodium gluconate and glucose.

3. The use of the quick-setting super-high-water cemented filling and fire prevention and extinguishing material according to claim 1 in coal fire prevention, characterized in that, The gypsum in the B component is selected from any one or more than two combinations of anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum.

4. Application of the quick-setting super-high-water cemented filling and fire-prevention and extinguishing material according to claim 1 in coal fire prevention, characterized in that, The preparation method of the material comprises the following steps: (1) weighing the raw materials according to the proportions, adding the sulphoaluminate cement, the bauxite, the calcium sulphoaluminate, the retarder, the borax, the associated alkali swelling thickener, and the sodium lignosulfonate into a powder mixing and stirring tank according to the proportions, and uniformly mixing to obtain the A component; (2) weighing the raw materials according to the proportions, adding the gypsum, the lime, the quick-setting early-strength agent, the hydroxypropyl methyl cellulose, and the guar gum into a powder mixing and stirring tank according to the proportions, and uniformly mixing to obtain the B component.

5. The use of the quick-setting super-high-water cemented filling and fire prevention and extinguishing material according to claim 1 in coal fire prevention, characterized in that, The proportions of the A component and water and the proportions of the B component and water are consistent.

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