A high-viscosity consolidation material for mine use and its preparation method

Abstract

The present invention discloses a high-viscosity consolidation material for mining and its preparation method, belonging to the technical field of mining reinforcement and sealing materials. The key technical points of its technical solution are a high-viscosity consolidation material for mining, which is composed of component A, component B, and component C with a weight ratio of 1:(0.5-1):(0.5-1). Component A includes the following raw materials in parts by weight: 35-45 parts of rapid-hardening sulphoaluminate cement, 20-30 parts of coal gangue powder, 15-20 parts of sulphoaluminate cement, 2-5 parts of expansion agent, 0.5-1.5 parts of water reducing agent, 5-10 parts of fly ash, 5-8 parts of slag cement, 0.2-0.8 parts of lithium carbonate, and 1-3 parts of retarder; Component B includes the following raw materials in parts by weight: 60-70 parts of portland cement, 5-12 parts of calcium carbonate, 10-15 parts of calcium oxide, and 1-3 parts of retarder; Component C includes the following raw materials in parts by weight: 70-80 parts of polyurethane emulsion, 1-3 parts of cellulose, 9-22 parts of water, and 0.5-1 part of water reducing agent, achieving the effect of improving the strength of inorganic consolidation materials.

Description

Technical Field

[0001] The present invention relates to the technical field of mine reinforcement and sealing materials, and in particular to a high-viscosity consolidation material for mines and a preparation method thereof. Background Technique

[0002] The mine consolidation material is formed by mixing two components in a volume ratio of 1:1 under low-temperature conditions. After the material is injected into the formation, it can quickly penetrate into fine cracks, expand and solidify. By utilizing its excellent connection and cementing properties with the rock, the broken rocks are connected into a whole, increasing the supporting force of the rock stratum, ensuring production safety, and being convenient to use. Therefore, it is often used in mines to prevent the weathering of mine surrounding rocks, the corrosion of metal support materials, the spontaneous combustion of coal seams, the leakage of harmful gases, etc. It is also applicable to the sealing of permanent main roadways, the bottom of the shaft yard, tunnels, the plugging of toxic and harmful gases, and can be sprayed on the surface of rock masses and other areas.

[0003] At present, the commonly used consolidation materials are inorganic consolidation materials and organic consolidation materials. Among them, the organic consolidation material has a high reaction temperature and there are certain safety hazards, so more inorganic consolidation materials are used. However, the strength of the inorganic consolidation material after hardening is relatively low, the curing time is long, the rebound rate is large, and the manual construction time is long, which affects the efficiency. Summary of the Invention

[0004] In order to improve the strength of the inorganic consolidation material, the present invention provides a high-viscosity consolidation material for mines and a preparation method thereof.

[0005] The first aspect of the present invention is to provide a high-viscosity consolidation material for mines, adopting the following technical solution:

[0006] A high-viscosity consolidation material for mines is composed of component A, component B, and component C with a weight ratio of 1:(0.5 - 1):(0.5 - 1). The component A includes the following raw materials in parts by weight: 35 - 45 parts of rapid-hardening sulphoaluminate cement, 20 - 30 parts of coal gangue powder, 15 - 20 parts of sulphoaluminate cement, 2 - 5 parts of an expansive agent, 0.5 - 1.5 parts of a water-reducing agent, 5 - 10 parts of fly ash, 5 - 8 parts of slag cement, 0.2 - 0.8 parts of lithium carbonate, and 1 - 3 parts of a retarder;

[0007] The component B includes the following raw materials in parts by weight: 60 - 70 parts of portland cement, 5 - 12 parts of calcium carbonate, 10 - 15 parts of calcium oxide, and 1 - 3 parts of a retarder;

[0008] The component C includes the following raw materials in parts by weight: 70 - 80 parts of polyurethane emulsion, 1 - 3 parts of cellulose, 9 - 22 parts of water, and 0.5 - 1 part of a water-reducing agent.

[0009] Preferably, the component A comprises the following raw materials in parts by weight: 40-45 parts of rapid hardening sulphoaluminate cement, 25-30 parts of coal gangue powder, 17-20 parts of sulphoaluminate cement, 3-4 parts of expansion agent, 1.0-1.5 parts of water reducing agent, 5-10 parts of fly ash, 5-8 parts of slag cement, 0.2-0.8 parts of lithium carbonate, and 1-3 parts of setting retarder;

[0010] The component B comprises the following raw materials in parts by weight: 65-70 parts of portland cement, 6-9 parts of calcium carbonate, 12-15 parts of calcium oxide, and 1-3 parts of setting retarder;

[0011] The component C comprises the following raw materials in parts by weight: 75-80 parts of polyurethane emulsion, 2-3 parts of cellulose, 9-22 parts of water, and 0.5-1 of water reducing agent.

[0012] By adopting the above technical solution, after mixing the component A, component B and component C in the present application, fly ash and slag cement, as ultrafine mineral powder, can effectively fill the voids between the particles of rapid hardening sulphoaluminate cement. And when the rapid hardening sulphoaluminate cement sets and hardens, the expansion agent will expand with the volume, generating prestress, fully filling the voids of the cement, effectively improving the density of the consolidation material, thus contributing to improving the strength of the consolidation material; in addition, the addition of lithium carbonate in component A can not only react with the water in the consolidation material to generate lithium hydroxide, absorb and release the heat of cement hydration, reduce the dry shrinkage cracking of the consolidation material caused by temperature changes, but also lithium carbonate participates in the cement hydration reaction to form a dense protective film, preventing acidic substances and salts from eroding the internal structure of the material, and improving the durability of the consolidation material.

[0013] The addition of calcium carbonate and calcium oxide in component B has the effect of promoting cement hardening and improving the strength of the consolidation material.

[0014] The combined use of polyurethane emulsion and cellulose in component C can prevent the generation of cracks during the drying shrinkage process of the consolidation material and improve the strength of the consolidation material. The reason may be that: the polyurethane emulsion plays a bridging and active role in the consolidation material. Among them, the active groups in the polyurethane emulsion exchange with free calcium ions, aluminum ions and iron ions in the cement hydration to form special bridging bonds, and physical and chemical adsorption occurs around the cement particles to form a continuous phase with high homogeneity, reducing the overall elastic modulus, improving the physical organizational structure and internal stress state of the cement paste, increasing the deformation resistance of the consolidation material and greatly reducing the possibility of generating microcracks. Even if microcracks occur, due to the bridging effect of the polyurethane emulsion, the development of cracks can also be restricted; secondly, since the polyurethane emulsion contains a certain amount of surfactant, it can play a water reducing role, disperse the cement particles at the same time, improve the workability of the cement paste, reduce the water consumption, thereby reducing harmful pores such as capillary pores in the cement paste and improving the densification performance of the cement paste.

[0015] Therefore, the synergistic effect of the raw materials in this application can not only shorten the setting time of the consolidation material, but also improve the compressive strength and adhesiveness of the consolidation material, so that the initial setting time of the consolidation material is within 15 minutes, the final setting time is within 40 minutes, the 1-day compressive strength reaches more than 25 MPa, and the 3-day compressive strength is more than 28 MPa.

[0016] Preferably, the C component further includes 10-15 parts by weight of gypsum.

[0017] Preferably, the fly ash used is Class I fly ash.

[0018] Preferably, the expansion agent is one or a combination of two of plastic expansion agent and UEA expansion agent.

[0019] Preferably, the weight ratio of the plastic expansion agent to the UEA expansion agent is 1:1.

[0020] By adopting the above technical solution, when the expansion agent is a combination of plastic expansion agent and UEA expansion agent, it can not only improve the density of the consolidation material, but also prevent shrinkage and cracking, so that the consolidation material has better compactness and the strength of the consolidation material is improved.

[0021] Preferably, the retarder is composed of sodium gluconate, tartaric acid and citric acid according to a weight ratio of 1:(0.5-1.2):1.

[0022] Preferably, the solid content of the polyurethane emulsion is 40-50%.

[0023] The second aspect of the present invention provides a preparation method of a high-viscosity consolidation material for mining, including the following steps:

[0024] Mix the raw materials in component A and stir for 10-20 minutes to obtain component A; mix the raw materials in component B and stir for 10-20 minutes to obtain component B, mix the raw materials in component C and stir for 10-20 minutes to obtain component C, then mix component A and half of component C and stir for 10-20 minutes to obtain mixture one, mix component B and the remaining half of component C and stir for 10-20 minutes to obtain mixture two, and then mix mixture one and mixture two and stir for 10-20 minutes to obtain the high-viscosity consolidation material for mining.

[0025] By adopting the above technical solution, after the raw materials of component A, component B and component C are respectively mixed, then component A and half of component C are mixed, component B and the remaining half of component C are mixed, and then the two are mixed, which can make the mixing between the raw materials more uniform and help to improve the bonding strength of the consolidation material.

[0026] In summary, the present invention has the following beneficial effects: During the mixing and stirring of component A, component B, and component C in this application, fly ash can effectively fill the voids between cement particles, so that the density of the consolidated material formed after spraying or grouting is relatively high. As the cement hydration reaction proceeds, the active groups in the polyurethane emulsion exchange with free calcium ions, aluminum ions, and iron ions during cement hydration to form special bridge bonds, which undergo physical and chemical adsorption around the cement particles to form a continuous phase with high uniformity, reducing the overall elastic modulus, improving the physical tissue structure and internal stress state of the cement slurry, increasing the deformation-bearing capacity, and lithium carbonate can absorb and release the heat of cement hydration during this process to avoid too high reaction temperature. Moreover, during the cement hydration reaction, lithium carbonate generates a dense protective film on the surface of the consolidated material to prevent acidic substances and salts from eroding the internal structure of the material, improving the durability of the consolidated material. In addition, the addition of lithium carbonate can also promote the setting of the consolidated material after spraying, shortening the setting time of the consolidated material. Therefore, the synergistic effect of the raw materials in component A, component B, and component C in this application can not only shorten the setting time of the consolidated material, but also improve the compressive strength and adhesiveness of the consolidated material, making the initial setting time of the consolidated material within 15 minutes, the final setting time within 40 minutes, the 1-day compressive strength reach more than 25 MPa, and the 3-day compressive strength be more than 28 MPa. Therefore, for the gap to be blocked or the leaking gap, spraying or grouting with the consolidated material obtained in this application can quickly set the gap, playing an effective sealing role.

[0027] In addition, the reinforced surface formed after spraying or grouting of the consolidated material in this application will not catch fire spontaneously after being ignited, and has good flame retardant effect. Detailed implementation mode

[0028] The present invention will be further described in detail below in conjunction with embodiments.

[0029] The raw materials used in the examples and comparative examples of this application are all commercially available.

[0030] Example 1

[0031] A preparation method of a high-viscosity consolidated material for mine use includes the following steps:

[0032] Mix 35 kg of rapid hardening sulphoaluminate cement, 20 kg of coal gangue powder, 15 kg of sulphoaluminate cement, 2 kg of plastic expansion agent, 0.5 kg of polycarboxylate water reducer, 5 kg of fly ash, 5 kg of slag cement, 0.2 kg of lithium carbonate, and 1 kg of retarder and stir for 10 minutes to obtain component A;

[0033] Mix 60 kg of portland cement, 5 kg of calcium carbonate, 10 kg of calcium oxide, and 1 kg of retarder and stir for 10 minutes to obtain component B;

[0034] Mix 70 kg of polyurethane emulsion, 1 kg of cellulose, 9 kg of water, and 0.5 kg of water reducer and stir for 10 minutes to obtain Component C; Take Component A, Component B, and Component C and mix them in a weight ratio of 1:0.5:0.5. Specifically, take 80 kg of Component A, 40 kg of Component B, and 40 kg of Component C. When mixing, mix 80 kg of Component A and 20 kg of Component C and stir for 10 minutes to obtain Mixture 1, mix 40 kg of Component B and the remaining 20 kg of Component C and stir for 10 minutes to obtain Mixture 2, and then mix Mixture 1 and Mixture 2 and stir for 10 minutes to obtain a high-viscosity consolidation material for mining; Among them, the retarders in Component A and Component B are composed of sodium gluconate, tartaric acid, and citric acid in a weight ratio of 1:0.5:1. The fly ash uses Class I fly ash. The plasticizing expansion agent has a density of 300 - 600 g / L and an average particle size of 3.9 ± 0.6 μm. The properties of the polyurethane emulsion are: solid content 52 ± 1%, viscosity 500 - 2000 mPa·s, and pH value 7 - 8.

[0035] Example 2

[0036] A preparation method of a high-viscosity consolidation material for mining, comprising the following steps:

[0037] Mix 40 kg of rapid hardening sulphoaluminate cement, 25 kg of coal gangue powder, 17 kg of sulphoaluminate cement, 3 kg of plasticizing expansion agent, 1 kg of polycarboxylate water reducer, 6 kg of fly ash, 5 kg of slag cement, 0.4 kg of lithium carbonate, and 1 kg of retarder and stir for 15 minutes to obtain Component A;

[0038] Mix 65 kg of portland cement, 6 kg of calcium carbonate, 12 kg of calcium oxide, and 1 kg of retarder and stir for 15 minutes to obtain Component B;

[0039] Mix 75 kg of polyurethane emulsion, 2 kg of cellulose, 15 kg of water, and 0.5 kg of polycarboxylate water reducer and stir for 15 minutes to obtain Component C. Take Component A, Component B, and Component C and mix them in a weight ratio of 1:0.5:0.5. Specifically, take 80 kg of Component A, 40 kg of Component B, and 40 kg of Component C. When mixing, mix 80 kg of Component A and 20 kg of Component C and stir for 15 minutes to obtain Mixture 1, mix 40 kg of Component B and the remaining 20 kg of Component C and stir for 5 minutes to obtain Mixture 2, and then mix Mixture 1 and Mixture 2 and stir for 15 minutes to obtain a high-viscosity consolidation material for mining; Among them, the retarders in Component A and Component B are composed of sodium gluconate, tartaric acid, and citric acid in a weight ratio of 1:0.5:1. The fly ash uses Class I fly ash. The plasticizing expansion agent has a density of 300 - 600 g / L and an average particle size of 3.9 ± 0.6 μm. The properties of the polyurethane emulsion are: solid content 52 ± 1%, viscosity 500 - 2000 mPa·s, and pH value 7 - 8.

[0040] Example 3

[0041] A preparation method of a high-viscosity consolidation material for mining, comprising the following steps:

[0042] Mix 45 kg of rapid hardening sulphoaluminate cement, 30 kg of coal gangue powder, 20 kg of sulphoaluminate cement, 4 kg of plastic expansion agent, 1.5 kg of polycarboxylate water reducer, 8 kg of fly ash, 8 kg of slag cement, 0.6 kg of lithium carbonate, and 3 kg of retarder and stir for 20 minutes to obtain Component A;

[0043] Mix 70 kg of portland cement, 9 kg of calcium carbonate, 15 kg of calcium oxide, and 3 kg of retarder and stir for 15 minutes to obtain Component B;

[0044] Mix 80 kg of polyurethane emulsion, 3 kg of cellulose, 17 kg of water, and 0.8 kg of polycarboxylate water reducer and stir for 20 minutes to obtain Component C; Take Component A, Component B, and Component C and mix them according to a weight ratio of 1:0.5:0.5. Specifically, take 80 kg of Component A, 40 kg of Component B, and 40 kg of Component C. When mixing, mix 80 kg of Component A and 20 kg of Component C and stir for 20 minutes to obtain Mixture 1, mix 40 kg of Component B and the remaining 20 kg of Component C and stir for 20 minutes to obtain Mixture 2, and then mix Mixture 1 and Mixture 2 and stir for 15 minutes to obtain the high-viscosity consolidation material for mining; The retarder in Component A and Component B is composed of sodium gluconate, tartaric acid, and citric acid according to a weight ratio of 1:0.5:1. The fly ash is Class I fly ash. The density of the plastic expansion agent is 300-600 g / L, and the average particle size is 3.9±0.6 μm. The performance of the polyurethane emulsion is: solid content 52±1%, viscosity 500-2000 mPa·s, and pH value 7-8.

[0045] Example 4

[0046] A preparation method of a high-viscosity consolidation material for mining, comprising the following steps:

[0047] Mix 45 kg of rapid hardening sulphoaluminate cement, 30 kg of coal gangue powder, 20 kg of sulphoaluminate cement, 5 kg of plastic expansion agent, 1.5 kg of polycarboxylate water reducer, 10 kg of fly ash, 8 kg of slag cement, 0.8 kg of lithium carbonate, and 3 kg of retarder and stir for 20 minutes to obtain Component A;

[0048] Mix 70 kg of portland cement, 12 kg of calcium carbonate, 15 kg of calcium oxide, and 3 kg of retarder and stir for 20 minutes to obtain Component B;

[0049] Mix 80 kg of polyurethane emulsion, 3 kg of cellulose, 22 kg of water, and 1 kg of polycarboxylate water reducer and stir for 20 minutes to obtain Component C. Take Component A, Component B, and Component C and mix them according to a weight ratio of 1:1:1. Specifically, take 80 kg of Component A, 80 kg of Component B, and 80 kg of Component C. When mixing, stir and mix 80 kg of Component A and 40 kg of Component C for 20 minutes to obtain Mixture 1, stir and mix 80 kg of Component B and the remaining 40 kg of Component C for 20 minutes to obtain Mixture 2, and then stir and mix Mixture 1 and Mixture 2 for 20 minutes to obtain a high-viscosity consolidation material for mines; among them, the retarder in Component A and Component B is composed of sodium gluconate, tartaric acid, and citric acid according to a weight ratio of 1:0.5:1. Fly ash uses Class I fly ash. The plasticizing expansion agent has a density of 300 - 600 g / L and an average particle size of 3.9 ± 0.6 μm. The properties of the polyurethane emulsion are: solid content 52 ± 1%, viscosity 500 - 2000 mPa·s, and pH value 7 - 8.

[0050] Example 5

[0051] A preparation method of a high-viscosity consolidation material for mines, which is different from Example 3 in that the raw materials in Component C are 80 kg of polyurethane emulsion, 3 kg of cellulose, 22 kg of water, 1 kg of polycarboxylate water reducer, and 10 kg of gypsum, and the others are the same as in Example 3.

[0052] Example 6

[0053] A preparation method of a high-viscosity consolidation material for mines, which is different from Example 3 in that the raw materials in Component C are 80 kg of polyurethane emulsion, 3 kg of cellulose, 22 kg of water, 1 kg of polycarboxylate water reducer, and 12 kg of gypsum, and the others are the same as in Example 3.

[0054] Example 7

[0055] A preparation method of a high-viscosity consolidation material for mines, which is different from Example 3 in that the raw materials in Component C are 80 kg of polyurethane emulsion, 3 kg of cellulose, 22 kg of water, 1 kg of polycarboxylate water reducer, and 15 kg of gypsum, and the others are the same as in Example 3.

[0056] Example 8

[0057] A preparation method of a high-viscosity consolidation material for mines, which is different from Example 6 in that the plasticizing expansion agent in Component A is replaced with an equal amount of UEA expansion agent, and the others are the same as in Example 6.

[0058] Example 9

[0059] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 6 in that the retarder is composed of sodium gluconate, tartaric acid and citric acid according to a weight ratio of 1:1.2:1, and the others are the same as in Example 6.

[0060] Example 10

[0061] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 6 in that the expansive agent in Component A is a mixture of a plastic expansive agent and a UEA expansive agent, and the weight ratio of the plastic expansive agent to the UEA expansive agent is 1:1, that is, the content of the plastic expansive agent is 2 kg and the content of the UEA expansive agent is 2 kg, and the others are the same as in Example 6.

[0062] Example 11

[0063] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 10 in that Class II fly ash is used as the fly ash in Component A, and the others are the same as in Example 10.

[0064] Comparative Example 1

[0065] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 10 in that there is no polyurethane emulsion in Component C, and the others are the same as in Example 10.

[0066] Comparative Example 2

[0067] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 10 in that an equal amount of water-soluble epoxy resin emulsion is used to replace the polyurethane emulsion in Component C, and the others are the same as in Example 10.

[0068] Comparative Example 3

[0069] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 10 in that an equal amount of vinyl acetate-ethylene copolymer emulsion is used to replace the polyurethane emulsion in Component C, and the others are the same as in Example 10, wherein the properties of the vinyl acetate-ethylene copolymer emulsion are: pH value is 4.0 - 6.0, viscosity (25 °C) is 500 - 1000 mPa·s, solid content ≥ 54.5%, ethylene content is 16 ± 2%, and the others are the same as in Example 10.

[0070] Comparative Example 4

[0071] A preparation method of a high-viscosity consolidation material for mine use, which is different from Example 10 in that there is no lithium carbonate in Component A, and the others are the same as in Example 10.

[0072] Comparative Example 5

[0073] A preparation method of a high-viscosity consolidation material for mining, which is different from Example 10 in that an equal amount of sodium carbonate accelerator is used instead of lithium carbonate in Component A, and the others are the same as in Example 10.

[0074] Performance testing

[0075] The setting time, compressive strength, flexural strength and bonding strength of the high-viscosity consolidation materials obtained from the above examples, comparative examples and comparative examples were tested, and the test results are shown in Table 1.

[0076] Among them, the compressive strength, flexural strength and setting time were tested according to the relevant regulations in GB / T50448-2015 "Technical Specification for Application of Cementitious Grouting Materials";

[0077] The bonding strength was tested according to the relevant regulations in JT / T1211.1-2018 "Rapid Repair Materials for Cement Concrete in Highway Engineering".

[0078] Table 1 Performance test results of high-viscosity consolidation materials

[0079]

[0080] It can be seen from Table 1 that:

[0081] The initial setting time of the high-viscosity consolidation material obtained in the embodiment of the present application is within 15 minutes, and the final setting time is within 40 minutes, and it has good bonding strength, compressive strength and flexural strength, indicating that after the raw materials of Component A, Component B and Component C in the present application are mixed, the strength of the consolidation material can be effectively improved.

[0082] Compared with Example 3, in Examples 5-7, after adding gypsum to Component C, the compressive strength, flexural strength and bonding strength of the consolidation material are all improved compared with the compressive strength, flexural strength and bonding strength in Example 3. The reason is that during the cement hardening process, gypsum can act as a catalyst to promote the chemical reactions during the cement hydration reaction. These reactions can promote the faster growth of cement crystals and further improve the strength of the consolidation material.

[0083] Compared with Example 6, in Example 10, when the expansive agent adopts a combination of a plastic expansive agent and a UEA expansive agent, the setting time of the consolidated material obtained in Example 10 is lower than that of the consolidated material in Example 6, and the compressive strength, flexural strength, and bonding strength of the consolidated material obtained in Example 10 are all better than those of the consolidated material obtained in Example 6. The reason may be that: through diffusion, the plastic expansive agent can improve the fine pores and porosity inside the consolidated material, making the inside of the consolidated material more uniform, thereby improving the compactness performance of the consolidated material. The UEA expansive agent reacts with water during the cement hydration reaction to generate the expansive crystalline hydrate ettringite, causing the consolidated material to expand moderately in the early stage. Under the constraint of cellulose, the expansion is transformed into compressive stress, which can offset the stress generated during the dry shrinkage of the consolidated material, reduce the cracking of the consolidated material, and make the consolidated material denser.

[0084] Compared with Example 10, in Comparative Example 1, when the polyurethane emulsion is missing in the C-component raw material, the setting time of the consolidated material obtained in Comparative Example 1 is long, and the compressive strength, flexural strength, and bonding strength are all much lower than those of the consolidated material obtained in Example 10, indicating that the addition of the polyurethane emulsion can effectively improve the compressive strength, flexural strength, and bonding strength of the consolidated material, and at the same time can also shorten the setting time of the consolidated material.

[0085] Compared with Example 10, in Comparative Examples 2-3, when the water-soluble epoxy resin emulsion and the vinyl acetate-ethylene copolymer emulsion are used to replace the polyurethane emulsion respectively, the compressive strength, flexural strength, and bonding strength of the consolidated material obtained in Comparative Examples 2-3 are much lower than those of the consolidated material obtained in Example 10, and the setting time of the consolidated material obtained in Comparative Examples 2-3 is also relatively long. From this, it can be further explained that the cooperation of the polyurethane emulsion with raw materials such as cement and cellulose can effectively ensure the strength of the consolidated material.

[0086] Compared with Example 10, in Comparative Examples 4-5, when lithium carbonate is missing in the A-component or the sodium carbonate accelerator is used to replace lithium carbonate, the setting time of the consolidated material obtained in Comparative Examples 4-5 is long, and the compressive strength, flexural strength, and bonding strength are also lower than those in Example 10. It can be seen that lithium carbonate in this application not only plays a role in accelerating setting, but also can react with cement to improve the strength of the consolidated material.

[0087] The examples of this specific implementation manner are all preferred examples of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-viscosity consolidation material for mine use, characterized in that: It is composed of component A, component B and component C with a weight ratio of 1:(0.5 - 1):(0.5 - 1). Component A includes the following raw materials in parts by weight: 40 - 45 parts of rapid hardening sulphoaluminate cement, 25 - 30 parts of coal gangue powder, 17 - 20 parts of sulphoaluminate cement, 3 - 4 parts of expansive agent, 1.0 - 1.5 parts of water reducing agent, 5 - 10 parts of fly ash, 5 - 8 parts of slag cement, 0.2 - 0.8 parts of lithium carbonate, 1 - 3 parts of retarder. The expansive agent is composed of a plastic expansive agent and a UEA expansive agent with a weight ratio of 1:1; Component B includes the following raw materials in parts by weight: 65 - 70 parts of portland cement, 6 - 9 parts of calcium carbonate, 12 - 15 parts of calcium oxide, 1 - 3 parts of retarder; Component C includes the following raw materials in parts by weight: 75 - 80 parts of polyurethane emulsion, 2 - 3 parts of cellulose, 9 - 22 parts of water, 0.5 - 1 part of water reducing agent, 10 - 15 parts of gypsum.

2. A highly viscous consolidation material for mining according to claim 1, characterized in that: The fly ash used is Class I fly ash.

3. The high-viscosity consolidation material for mine use according to claim 1, characterized in that: The retarder is composed of sodium gluconate, tartaric acid and citric acid in a weight ratio of 1:(0.5 - 1.2):

1.

4. The high-viscosity consolidation material for mining according to claim 1, characterized in that: The solid content of the polyurethane emulsion is 40 - 50%.

5. A preparation method of the high-viscosity consolidation material for mine use according to any one of claims 1-4, characterized in that, It includes the following steps: Mix the raw materials in component A and stir for 10 - 20 minutes to obtain component A; Mix the raw materials in component B and stir for 10 - 20 minutes to obtain component B; Mix the raw materials in component C and stir for 10 - 20 minutes to obtain component C. Then, stir and mix component A and half of component C for 10 - 20 minutes to obtain mixture one; Stir and mix component B and the remaining half of component C for 10 - 20 minutes to obtain mixture two. Then, stir and mix mixture one and mixture two for 10 - 20 minutes to obtain a highly viscous consolidation material for mine use.

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