Novel inorganic environment-friendly airtight material for mine

Abstract

The invention relates to the technical field of inorganic environment-friendly sealing materials for mining, and discloses a novel inorganic environment-friendly sealing material for mining, which comprises the following raw materials: a component A: cement, a filler, a surfactant, a flame retardant, a foaming agent, a plasticizer, a cement curing agent, dispersible latex powder and water; and the component B comprises an expanding agent, a mixed emulsion, a diluent and water. According to the novel mineral inorganic environment-friendly airtight material, the flame retardant and the dispersible latex powder are added, so that the material has excellent fireproof performance, in a high-temperature environment, a heat-insulating oxygen-isolating layer formed by the flame retardant can effectively prevent fire from spreading, and the fire endurance of the material is further improved due to the structural stability of the material enhanced by the dispersible latex powder; reliable fireproof guarantee is provided for mine safety production; the organic silicon surfactant is added, so that after the material is sprayed on the inner wall of a mine, the surface is clean and tidy, the material can be tightly bonded with the inner wall, the material performance is stable, and in the preparation process, the foaming agent and the plasticizer act synergistically, so that the material is quick in reaction and high in foam expansion.

Description

Technical Field

[0001] This invention relates to the field of inorganic environmentally friendly sealing materials for mining, specifically to new inorganic environmentally friendly sealing materials for mining. Background Technology

[0002] In the process of mine mining, constructing an effective sealed structure is crucial. Its main functions include preventing spontaneous combustion of coal seams, blocking the spread of harmful gases (such as methane and carbon monoxide), and preventing gas explosions, thereby ensuring safe mine production. Currently, mine sealing mainly employs the following methods:

[0003] This method of sealing concrete walls results in high-strength walls. However, the construction process relies on specialized equipment such as concrete pumps, is complex, and has high costs. More importantly, concrete is inherently a brittle material and is highly susceptible to cracking under significant pressure.

[0004] Using materials such as quarry stone, sand, and cement, sealed walls are constructed manually. This method was widely used in the past due to the relatively easy availability of materials and the simplicity of construction. However, in practice, it has many drawbacks. For example, it requires a large amount of auxiliary transportation, especially in tunnels where tracks cannot be laid and materials must be carried manually, resulting in extremely high labor intensity for workers and low efficiency in sealing construction.

[0005] Polymer materials, with their excellent mechanical properties, flexibility, and rapid solidification speed, exhibit good sealing effects and high sealing efficiency in sealing processes. However, these materials are expensive, increasing the cost of mine construction. Moreover, their high curing temperature poses a significant safety hazard if not properly controlled during construction.

[0006] With the continuous improvement of the mechanization of coal mining, traditional sealing materials and construction techniques are no longer able to meet the requirements of efficient, safe and environmentally friendly production in modern mines.

[0007] Therefore, this invention provides a novel inorganic environmentally friendly sealing material for mining to solve the problems mentioned above. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a novel inorganic environmentally friendly sealing material for mining, which has advantages such as meeting the needs of safe production and green mining in mines, and solves the problems mentioned above.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention provides the following technical solution: a new inorganic environmentally friendly sealed material for mining, comprising the following raw materials in the indicated weight proportions: Component A: 400-600 parts cement, 50-100 parts filler, 4-8 parts surfactant, 10-30 parts flame retardant, 10-30 parts foaming agent, 8-11 parts plasticizer, 30-50 parts cement curing agent, 10-20 parts dispersible latex powder, and 200-400 parts water;

[0012] Component B: 10-12 parts of swelling agent, 450-650 parts of mixed emulsion, 10-30 parts of diluent, and 300-500 parts of water.

[0013] Preferably, the mixed emulsion is prepared by mixing polyvinyl acetate emulsion and polyacrylate emulsion in a 2:1 ratio.

[0014] Preferably, the cement is one or more of acid-based cement or silicate cement, and the filler is one or more of kaolin, quartz sand, lime, and fly ash.

[0015] Preferably, the surfactant is an organosilicon surfactant, the flame retardant is one or more of trichloropropyl phosphate and dimethyl methyl phosphate, and the foaming agent is one or more of n-pentane, isopentane, n-hexane, cyclopentane, petroleum ether, and dichlorofluoroethane.

[0016] Preferably, the plasticizer is one of dioctyl phthalate and dibutyl phthalate, and the cement curing agent is one of calcium sulfate and anhydrous sodium sulfate.

[0017] Preferably, the preparation steps of component A are as follows:

[0018] After accurately weighing the solid powders such as cement, filler, flame retardant, and cement curing agent according to the proportion, add them to a high-speed mixer and stir at a speed of 1000-1500 rpm for 10-15 minutes to ensure that they are fully mixed.

[0019] Then, the surfactant, plasticizer, and dispersible latex powder are dissolved in water to prepare a uniform solution. Under the above-mentioned solid stirring state, the solution is slowly added to the above solid mixture and stirring is continued for 20-30 minutes. After the components are fully wetted and dispersed, a uniform component A slurry is formed.

[0020] Preferably, the preparation steps of component B are as follows:

[0021] After accurately weighing the polyvinyl acetate emulsion, polyacrylate emulsion, and diluent according to the proportion, add them to the mixing tank and stir at 500-800 rpm for 15-20 minutes to make them evenly mixed.

[0022] Then, the expansion agent is slowly added to the above mixture while stirring continuously. Water is then added, and stirring is continued for 30-40 minutes. After all components have fully reacted and dispersed evenly, component B slurry is obtained.

[0023] Preferably, during construction, the A component slurry and the B component slurry are rapidly mixed at a ratio of (1-1.5):1, and stirred for 3-5 minutes at a speed of 800-1200 rpm using a mixer to ensure that the two components react fully and are mixed evenly.

[0024] (III) Beneficial Effects

[0025] Compared with existing technologies, this invention provides a novel inorganic environmentally friendly sealing material for mining, which has the following beneficial effects:

[0026] 1. This new inorganic environmentally friendly sealing material for mining, through the addition of flame retardants and dispersible latex powder, possesses superior fire resistance. In high-temperature environments, the heat-insulating and oxygen-barrier layer formed by the flame retardant can effectively prevent the spread of fire, while the enhanced structural stability of the material by the dispersible latex powder further improves the material's fire resistance limit, providing reliable fire protection for safe production in mines. The addition of organosilicon surfactants ensures a clean surface after the material is sprayed onto the inner wall of the mine and allows it to adhere tightly to the inner wall, resulting in stable material performance. During the preparation process, the foaming agent and plasticizer work synergistically, resulting in rapid material reaction, high foaming ratio, and good mechanical properties.

[0027] 2. This new inorganic environmentally friendly sealing material for mining has an appropriate expansion rate. The expansion agent plays a role in the material hardening process, filling tiny pores and cracks, improving the material's density and impermeability. At the same time, the material's high foaming characteristics enable it to better adapt to complex confined spaces, closely adhering to the surrounding rock mass, effectively blocking the diffusion of harmful gases, preventing gas accumulation, reducing the risk of gas explosion, and ensuring the stable operation of the mine ventilation system. All components of the material are made from environmentally friendly raw materials, and are non-toxic, odorless, and pollution-free during construction and use. They will not harm the health of construction personnel, nor will they pollute the mine environment, meeting the environmental protection requirements for green mine construction. Detailed Implementation

[0028] 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.

[0029] Example 1:

[0030] Mining inorganic environmentally friendly sealed new material, including the following raw materials in the following weight proportions: Component A: 400 parts cement, 50 parts filler, 4 parts surfactant, 10 parts flame retardant, 10 parts foaming agent, 8 parts plasticizer, 30 parts cement curing agent, 10 parts dispersible latex powder, and 200 parts water.

[0031] The cement used is acid-based cement, the filler is kaolin and quartz sand, the surfactant is an organosilicon surfactant, the flame retardant is trichloropropyl phosphate, the foaming agent is n-pentane, the plasticizer is dioctyl phthalate, and the cement curing agent is calcium sulfate.

[0032] The specific steps for preparing component A are as follows:

[0033] After accurately weighing the solid powders such as cement, filler, flame retardant, and cement curing agent according to the proportion, add them to a high-speed mixer and stir at 1000 rpm for 10 minutes to ensure they are fully mixed.

[0034] Then, the surfactant, plasticizer, and dispersible latex powder are dissolved in water to prepare a uniform solution. Under the above-mentioned solid stirring state, the solution is slowly added to the above solid mixture and stirring is continued for 20 minutes. After the components are fully wetted and dispersed, a uniform component A slurry is formed.

[0035] Component B: 10 parts of expanding agent, 450 parts of mixed emulsion, 10 parts of diluent, and 300 parts of water. The mixed emulsion is prepared by mixing polyvinyl acetate emulsion and polyacrylate emulsion in a 2:1 ratio.

[0036] The specific steps for preparing component B are as follows:

[0037] After accurately weighing the polyvinyl acetate emulsion, polyacrylate emulsion, and diluent according to the proportions, add them to the mixing tank and stir at 500 rpm for 15 minutes to make them evenly mixed.

[0038] Then, the expanding agent is slowly added to the above mixture while stirring continuously. Water is then added, and stirring is continued for 30 minutes. After all components have fully reacted and dispersed evenly, component B slurry is obtained.

[0039] During construction, mix component A and component B slurry quickly at a 1:1 ratio using a mixer at 800 rpm for 3 minutes to ensure that the two components react fully and are mixed evenly.

[0040] Example 2:

[0041] Mining inorganic environmentally friendly sealed new material, including the following raw materials in the following weight proportions: Component A: 600 parts cement, 100 parts filler, 8 parts surfactant, 30 parts flame retardant, 30 parts foaming agent, 11 parts plasticizer, 50 parts cement curing agent, 20 parts dispersible latex powder, and 400 parts water.

[0042] The cement is one or more of acid-based cement or silicate cement, the filler is lime or fly ash, the surfactant is an organosilicon surfactant, the flame retardant is dimethyl methyl phosphate, the foaming agent is dichlorofluoroethane, the plasticizer is dibutyl phthalate, and the cement curing agent is anhydrous sodium sulfate.

[0043] The specific steps for preparing component A are as follows:

[0044] After accurately weighing the solid powders such as cement, filler, flame retardant, and cement curing agent according to the proportion, add them to a high-speed mixer and stir at 1500 rpm for 15 minutes to ensure they are fully mixed.

[0045] Then, the surfactant, plasticizer, and dispersible latex powder are dissolved in water to prepare a uniform solution. Under the above-mentioned solid stirring state, the solution is slowly added to the above-mentioned solid mixture and stirring is continued for 30 minutes. After the components are fully wetted and dispersed, a uniform component A slurry is formed.

[0046] Component B: 12 ​​parts of expanding agent, 650 parts of mixed emulsion, 30 parts of diluent, and 500 parts of water. The mixed emulsion is prepared by mixing polyvinyl acetate emulsion and polyacrylate emulsion in a 2:1 ratio.

[0047] The specific steps for preparing component B are as follows:

[0048] After accurately weighing the polyvinyl acetate emulsion, polyacrylate emulsion, and diluent according to the proportions, add them to the mixing tank and stir at 800 rpm for 20 minutes to make them evenly mixed.

[0049] Then, the expanding agent is slowly added to the above mixture while stirring continuously. Water is then added, and stirring is continued for 40 minutes. After all components have fully reacted and dispersed evenly, component B slurry is obtained.

[0050] During construction, mix component A and component B slurry quickly at a ratio of 1.5:1, and stir with a mixer at 1200 rpm for 5 minutes to ensure that the two components react fully and are mixed evenly.

[0051] Example 3:

[0052] Mining inorganic environmentally friendly sealed new material, including the following raw materials in the following weight proportions: Component A: 500 parts cement, 80 parts filler, 6 parts surfactant, 20 parts flame retardant, 20 parts foaming agent, 10 parts plasticizer, 40 parts cement curing agent, 15 parts dispersible latex powder, and 300 parts water.

[0053] The cement is one or more of acid-based cement or silicate cement, the filler is kaolin, quartz sand, and lime, the surfactant is an organosilicon surfactant, the flame retardant is trichloropropyl phosphate, the foaming agent is n-hexane, the plasticizer is dioctyl phthalate, and the cement curing agent is calcium sulfate.

[0054] The specific steps for preparing component A are as follows:

[0055] After accurately weighing the solid powders such as cement, filler, flame retardant, and cement curing agent according to the proportion, add them to a high-speed mixer and stir at 1200 rpm for 14 minutes to ensure they are fully mixed.

[0056] Then, the surfactant, plasticizer, and dispersible latex powder are dissolved in water to prepare a uniform solution. Under the above-mentioned solid stirring state, the solution is slowly added to the above-mentioned solid mixture and stirring is continued for 30 minutes. After the components are fully wetted and dispersed, a uniform component A slurry is formed.

[0057] Component B: 10 parts of expanding agent, 650 parts of mixed emulsion, 20 parts of diluent, and 400 parts of water. The mixed emulsion is prepared by mixing polyvinyl acetate emulsion and polyacrylate emulsion in a 2:1 ratio.

[0058] The specific steps for preparing component B are as follows:

[0059] After accurately weighing the polyvinyl acetate emulsion, polyacrylate emulsion, and diluent according to the proportions, add them to the mixing tank and stir at 600 rpm for 18 minutes to make them evenly mixed.

[0060] Then, the expanding agent is slowly added to the above mixture while stirring continuously. Water is then added, and stirring is continued for 35 minutes. After all components have fully reacted and dispersed evenly, component B slurry is obtained.

[0061] During construction, mix component A and component B slurry quickly at a ratio of 1.2:1, and stir with a mixer at 1000 rpm for 4 minutes to ensure that the two components react fully and are mixed evenly.

[0062] The beneficial effects of this invention are as follows: This new inorganic environmentally friendly sealing material for mining, through the addition of flame retardants and dispersible latex powder, possesses superior fire resistance. In high-temperature environments, the heat-insulating and oxygen-barrier layer formed by the flame retardant effectively prevents the spread of fire. The enhanced structural stability of the material by the dispersible latex powder further improves its fire resistance limit, providing reliable fire protection for safe mine production. The addition of organosilicon surfactants ensures a clean surface after spraying onto the mine's inner wall, allowing for tight adhesion and stable material performance. During preparation, the foaming agent and plasticizer work synergistically, resulting in rapid material reaction, high foaming ratio, and good mechanical properties. During construction, the material can be adapted to different construction sites. The material is designed to meet various construction needs and employs multiple construction methods, maintaining stable sealing performance under different geological conditions. The expanding agent plays a role in the material hardening process, filling micropores and cracks, improving the material's density and impermeability. At the same time, the material's high foaming properties enable it to better adapt to complex confined spaces, closely adhering to the surrounding rock mass, effectively blocking the diffusion of harmful gases, preventing gas accumulation, reducing the risk of gas explosion, and ensuring the stable operation of the mine ventilation system. All components of the material are made from environmentally friendly raw materials, and are non-toxic, odorless, and pollution-free during construction and use. They will not harm the health of construction workers or pollute the mine environment, meeting the environmental protection requirements for green mine construction.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new inorganic environmentally friendly sealing material for mining, characterized in that, The raw materials include the following components by weight: A component: cement 400-600 parts, filler 50-100 parts, surfactant 4-8 parts, flame retardant 10-30 parts, foaming agent 10-30 parts, plasticizer 8-11 parts, cement curing agent 30-50 parts, dispersible latex powder 10-20 parts, water 200-400 parts; B component: expanding agent 10-12 parts, mixed emulsion 450-650 parts, diluent 10-30 parts, water 300-500 parts.

2. The mine inorganic environment-friendly sealing new material according to claim 1, characterized in that, The mixed emulsion is prepared by stirring polyvinyl acetate emulsion and polyacrylate emulsion in a mixing ratio of 2:

1.

3. The mine inorganic environment-friendly sealing new material according to claim 1, characterized in that, The cement is one or more of acid salt cement or silicate cement, and the filler is one or more of kaolin, quartz sand, lime, and fly ash.

4. The mine inorganic environment-friendly sealing new material according to claim 1, characterized in that, The surfactant is an organic silicon surfactant, the flame retardant is one or more of trichloropropyl phosphate and methyl dimethyl phosphate, and the foaming agent is one or more of n-pentane, isopentane, n-hexane, cyclopentane, petroleum ether, and dichloromonofluoroethane.

5. The mine inorganic environment-friendly sealing new material according to claim 1, characterized in that, The plasticizer is one of dioctyl phthalate and dibutyl phthalate, and the cement curing agent is one of calcium sulfate and anhydrous sodium sulfate.

6. The mine inorganic environment-friendly sealing new material according to claim 2, characterized in that, The preparation steps of the A component are specifically as follows: The solid powders such as cement, filler, flame retardant, and cement curing agent are accurately weighed in proportion, then added to a high-speed mixer, and stirred at a speed of 1000-1500 rpm for 10-15 minutes to fully mix and uniformize; Then the surfactant, plasticizer, and dispersible latex powder are dissolved in water to prepare a uniform solution, which is slowly added to the above-mentioned solid mixture under the condition of stirring, and the stirring is continued for 20-30 minutes, after which the components are fully infiltrated and dispersed to form a uniform A component slurry.

7. The mine inorganic environment-friendly sealing new material according to claim 6, characterized in that, The preparation steps of the B component are specifically as follows: The polyvinyl acetate emulsion, polyacrylate emulsion, and diluent are accurately weighed in proportion, then added to a stirring kettle, and stirred at a speed of 500-800 rpm for 15-20 minutes to mix uniformly; Then the expanding agent is slowly added to the above-mentioned mixed solution while continuously stirring, and water is further added, and the stirring is continued for 30-40 minutes, after which the components are fully reacted and dispersed uniformly to obtain a B component slurry.

8. The mine inorganic environment-friendly sealing new material according to claim 7, characterized in that, When used in construction, the A component slurry and the B component slurry are quickly mixed in a ratio of (1-1.5):1, and a stirrer is used to stir at a speed of 800-1200 rpm for 3-5 minutes to fully react and mix the two components uniformly.