High-flow solid waste-based mine water plugging material and preparation method thereof

Abstract

The application provides a high-flow solid waste-based mine water plugging material and a preparation method thereof. The high-content solid waste-based mine water plugging material is obtained based on a high-content solid waste-based mine water plugging material composition, can well balance the effects of retarding and early strength, and has good fluidity. The high-flow solid waste-based mine water plugging material composition comprises aluminate cement, high-calcium minerals, fine aggregates, a retarding agent and a water reducing agent. Taking the sum of the weights of the aluminate cement, the high-calcium minerals and the fine aggregates as 100%, the weight percentages of the components are as follows: the aluminate cement is 4-20%, the high-calcium minerals are 10-80%, the fine aggregates are 10-80%, the retarding agent is 0.01-1%, and the water reducing agent is 0.01-1%. The weight content of free calcium oxide in the high-calcium minerals is 2-40%, and the weight ratio of the aluminate cement to the high-calcium minerals is 2:5-16.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water plugging materials, in particular to a high-content solid waste-based mine water plugging material and a preparation method thereof. BACKGROUND

[0002] The development of existing mine water plugging materials often fails to balance early strength and reasonable setting time. In the prior art, a conventional operation is to add a retarder to a cement-based mine filling material to prolong the setting time, but the early strength is greatly reduced.

[0003] Patent document CN 112174618 discloses a mine high-strength anti-shrinkage water plugging material and a preparation method thereof. The water plugging material is prepared by mixing and stirring sulfaluminate cement, quartz powder, slag powder, gypsum powder, quicklime, polyvinyl alcohol, a retarder, a crosslinking agent, an accelerator, and a stabilizer in a certain proportion. The material obtained by the scheme has a long setting time and does not have early strength (2h).

[0004] Patent document CN 111018452 discloses a preparation method of a novel superfine powder rapid-setting filling water plugging material. In the patent application, bauxite and limestone are used as industrial raw materials, and phosphogypsum and calcium oxide are added. After mixing and high-temperature calcination, some functional additives are added and ground to obtain the water plugging material. However, the process is complex and requires grinding and calcination. SUMMARY

[0005] Therefore, the present application provides a high-content solid waste-based mine water plugging material and a preparation method thereof. The high-content solid waste-based mine water plugging material is obtained based on a high-content solid waste-based mine water plugging material composition, which can well balance the effects of retarding and early strength, and has good fluidity.

[0006] To achieve the purpose, the present application provides the following technical solutions:

[0007] The present application provides a high-flow solid waste-based mine water plugging material composition. The composition includes aluminate cement, high-calcium minerals, fine aggregates, a retarder, and a water reducing agent. The weight percentages of the components are as follows, based on the sum of the weights of the aluminate cement, high-calcium minerals, and fine aggregates being 100%:

[0008] Aluminate cement 4-20%, high-calcium minerals 10-80%, fine aggregates 10-80%, retarder 0.01-1%, and water reducing agent 0.01-1%;

[0009] The weight content of free calcium oxide in the high-calcium minerals is 2-40%.

[0010] The weight ratio of the aluminate cement to the high-calcium minerals is 2:5-16.

[0011] In some embodiments, the high calcium mineral is selected from one or more of tourmaline slag, fly ash, gypsum or limestone with a free calcium oxide content of 2-40%. In some embodiments, the retarder is a carboxylate-containing organic acid.

[0012] In some embodiments, the retarder is selected from one or more of tartaric acid, citric acid, salicylic acid.

[0013] In some embodiments, the fine aggregate is selected from one or more of gangue powder, slag powder, bottom ash powder.

[0014] In some embodiments, the weight ratio of the aluminate cement and the high calcium mineral is 1:3-5, and the weight percentage of the fine aggregate is preferably 10%-60%.

[0015] In some embodiments, the water reducing agent is selected from one or more of polycarboxylic acid water reducing agent, naphthalene series water reducing agent, aliphatic water reducing agent.

[0016] The present application also provides a preparation method of a high-flow solid waste-based mine water plugging material, comprising the following steps: mixing and stirring each component in the composition of any one of claims 1-7 with water according to a liquid-solid weight ratio of 0.2-1 to obtain the high-flow solid waste-based mine water plugging material.

[0017] The present application also provides a high-flow solid waste-based mine water plugging material prepared by the preparation method described above. In some embodiments, the high-content solid waste-based mine water plugging material has a viscosity of <400 MPa·S, a 2h compressive strength of ≥1 MPa, a 1d compressive strength of ≥5 MPa, and a 7d compressive strength of >8 Mpa.

[0018] The technical solution provided by the present application has the following beneficial effects:

[0019] The high-content solid waste-based mine water plugging material provided by the present application is prepared by compounding a high calcium mineral with a specific free calcium oxide content, aluminate cement, a retarder and a water reducing agent, etc. according to a specific ratio. It not only has good retarding effect and flowability, but also reserves reasonable time for construction and is easy to construct, and at the same time has improved early strength. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present application, the present application will be further described below in conjunction with examples. It should be understood that the following examples are only for better understanding of the present application, and do not mean that the present application is limited to the following examples only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The term "and / or" as used herein refers to and encompasses any and all combinations of one or more of the associated listed items.

[0022] Unless otherwise indicated, conventional methods of chemistry, molecular biology, recombinant DNA techniques and biochemistry used herein are well known in the art and are described in detail in the literature. The procedures used are standard procedures, well known in the art and / or as described in the experimental procedures section of the present disclosure. The reagents used are commercially available or are prepared by standard methods known in the art.

[0023] The present application provides a high-flow solid waste-based mine water plugging material composition, which comprises aluminate cement, high calcium mineral, fine aggregate, retarder and water reducing agent, and the weight percentage of the following components is as follows, based on the sum of the weight of the aluminate cement, high calcium mineral and fine aggregate being 100%:

[0024] Aluminate cement 4-20%, high calcium mineral 10-80%, fine aggregate 10-80%, retarder 0.01-1%, water reducing agent 0.01-1%;

[0025] The weight content of free calcium oxide in the high calcium mineral is 2-40%;

[0026] The weight ratio of the aluminate cement to the high calcium mineral is 2:5-16.

[0027] In the composition of the present application, the high calcium mineral with a free calcium oxide content of 2-40% is selected. For the high calcium mineral, as long as the free calcium oxide content is 2-40%, it can be used, such as but not limited to one or more of tourmaline slag, fly ash, gypsum or limestone with a free calcium oxide content of 2-40%. The present application uses high calcium mineral with a high free calcium oxide content. Not all minerals, such as all fly ash, contain free calcium oxide that meets the above content requirements. For example, although the calcium content of the fly ash from a coal-fired furnace reaches more than 5% or even more than 10%, it belongs to high calcium fly ash, but the use of such fly ash cannot achieve the above-mentioned synergistic effect of the present application, because the calcium oxide in the fly ash from a coal-fired furnace is mainly inert calcium oxide, and the free calcium oxide content does not reach 2-40%. In the present application, fly ash with a free calcium oxide content of 2-40% can be used, such as circulating fluidized bed fly ash. The calcium oxide in the circulating fluidized bed fly ash mainly exists in the form of free calcium oxide, and the use of circulating fluidized bed fly ash with a free calcium oxide content of 2-40% can achieve the synergistic effect of the four components of aluminate cement, carboxylate-containing retarder and water reducing agent.

[0028] In a preferred embodiment, the retarder is an organic acid containing carboxylate. In a preferred embodiment, the retarder is selected from one or more of tartaric acid, citric acid or salicylic acid.

[0029] In some embodiments, the fine aggregate is selected from one or more of gangue powder, slag powder, and furnace bottom slag powder.

[0030] In some preferred embodiments, the weight ratio of the aluminate cement and the high calcium mineral is 1:3-5, and the weight percentage of the fine aggregate is preferably 10%-60%. Using the preferred weight ratio of the aluminate cement and the high calcium mineral, and the preferable amount of the fine aggregate, a better 2h strength can be obtained, and the early strength is high. For example, in some embodiments, based on the total weight of the aluminate cement, the high calcium mineral, and the fine aggregate, the aluminate cement is 10%, and the high calcium mineral is 40%.

[0031] In some embodiments, the water reducing agent is selected from one or more of polycarboxylic acid water reducing agent, naphthalene series water reducing agent, and aliphatic water reducing agent.

[0032] The inventors have found that the high calcium mineral with a free calcium oxide content of 2-40% and the carboxylate-containing additive have a certain synergistic effect with the aluminate cement, and by controlling the ratio of the high calcium mineral and the aluminate cement, the setting time can be shortened to have a 2h strength, and then by compounding the carboxylate-containing retarder, the setting time can be effectively prolonged, facilitating construction, and at the same time, the early strength is not reduced, but rather improved; this is just the opposite of the effect of adding a retarder in the cement base in the prior art. On the basis of the ternary synergy, the present application adds a water reducing agent, greatly improves the paste fluidity, and at the same time, maintains the early strength without reduction, and by compounding the aggregate, a mine water plugging material is prepared. In the prior art, the conventional operation is to add a retarder in the cement base to prolong the setting time, but the early strength is also greatly reduced, while in the present application, on the basis of the synergy of the aluminate cement and the high calcium mineral, a carboxylate-containing retarder is added, not only achieving the effect of retarding, but also further improving the early strength.

[0033] The present application also provides a preparation method of a high-flow solid waste-based mine water plugging material, comprising the following steps: mixing and stirring each component in the composition described above with water according to a liquid-solid ratio of 0.2-1 to prepare the high-flow solid waste-based mine water plugging material.

[0034] The application also provides a high-flow solid waste-based mine water plugging material prepared by the preparation method described above. The high-content solid waste-based mine water plugging material provided by the application has the characteristics of good fluidity, high early strength, and the like. The viscosity of the high-content solid waste-based mine water plugging material is less than 400 MPa·S, the 2h compressive strength is greater than or equal to 1 MPa, the 1d compressive strength is greater than or equal to 5 MPa, and the 7d compressive strength is greater than 8 MPa. In some embodiments, the hydration curing 2h compressive strength is as high as 6.9 MPa, and the 1d strength can be as high as more than 15 MPa, which far satisfies the demand of the water plugging material. The water plugging material of the application has a large amount of solid waste, which can effectively reduce the cost of the material and solve the problem of solid waste accumulation. The preparation process of the material is simple, and therefore the application has practicality and industrial feasibility.

[0035] The application adopts aluminate cement, high-calcium minerals with free calcium oxide content of 2-40%, a retarder, a water reducing agent, and fine aggregate mixed in a certain proportion, and water, and is prepared by mechanical mixing. The high-calcium minerals and the aluminate cement mixed in a specific proportion can have the effects of accelerating and enhancing. The high-calcium minerals and the aluminate cement have a synergistic effect, and exhibit excellent rapid setting and early strength, etc. However, the synergistic effect is not equivalent to that of the sulphoaluminate cement or the ordinary Portland cement. The application further adds a certain amount of a carboxylate-containing retarder to the aluminate cement and the high-calcium minerals, which can have the effect of retarding setting while further promoting the early hydration of the aluminate cement, thereby improving the early strength. The aluminate cement, the high-calcium minerals, and the carboxylate-containing retarder have a synergistic effect. On this basis, the addition of the water reducing agent can ensure that the strength does not decrease while greatly reducing the viscosity of the material, thereby improving the fluidity of the material and meeting the diffusion demand of the water plugging material in the well. In the prior art, the addition of the retarder to the cement-based material can have the effect of retarding setting, but the early strength is greatly reduced due to the prolonged setting time. However, the application solves the problem of the early strength reduction caused by the retarder, and has the effect of enhancing the early strength. Similarly, in the prior art, the addition of the water reducing agent generally prolongs the setting time and reduces the early strength without reducing the amount of water. However, the application adds the water reducing agent on the basis of the synergistic effect of the aluminate cement, the high-calcium minerals, and the retarder, which not only improves the fluidity and diffusion of the slurry, but also ensures that the early strength does not decrease, thereby forming a synergistic effect of a four-component system.

[0036] The application will be exemplarily described below in combination with specific embodiments.

[0037] The detection methods involved in the embodiments or comparative examples are described as follows.

[0038] Initial setting time: tested according to GBT 50080-2016 "Standard Test Methods for Properties of Fresh Ordinary Concrete";

[0039] Final setting time: tested according to GBT 50080-2016 "Standard for testing methods of normal concrete mixture performance";

[0040] 2h compressive strength: tested according to GBT 50081-2019 "Standard for testing methods of physical and mechanical properties of concrete";

[0041] 1d compressive strength: tested according to GBT 50081-2019 "Standard for testing methods of physical and mechanical properties of concrete";

[0042] 7d compressive strength: tested according to GBT 50081-2019 "Standard for testing methods of physical and mechanical properties of concrete";

[0043] Viscosity: tested by a rotary viscometer, and the testing temperature is normal temperature.

[0044] Example 1

[0045] The formulation of the water plugging material composition in this example is shown in Table 1, taking the sum of the weight of aluminate cement, high calcium mineral and fine aggregate as 100%.

[0046] The above aluminate cement, high calcium mineral and fine aggregate are mixed uniformly, and a retarder and a water reducing agent are added, and water is added according to the liquid-solid ratio shown in Table 1 below. First, the mixer is stirred at a stirring speed of 700 r / min for 30 s, and then stirred at a stirring speed of 1400 r / min for 90 s, to obtain the water plugging material.

[0047] The aluminate cement is purchased from Henan Zhengzhou Jianai, and the brand is CA50;

[0048] The high calcium mineral is high calcium fly ash, and the average particle size is 18.9 μm, and the free calcium oxide content is 12%;

[0049] The retarder is tartaric acid;

[0050] The fine aggregate is gangue powder, and the particle size is ≤1 mm;

[0051] The water reducing agent is a polycarboxylic acid water reducing agent, and the manufacturer is Nanjing Stebao (the polycarboxylic acid water reducing agent used in the following examples or comparative examples is from the same source).

[0052] Example 2

[0053] The formulation of the water plugging material composition in this example is shown in Table 1, taking the sum of the weight of aluminate cement, high calcium mineral and fine aggregate as 100%.

[0054] The aluminate cement, the high calcium mineral and the fine aggregate are mixed uniformly, the water reducing agent and the retarder are added, the water is added according to the liquid-solid ratio shown in Table 1, and the water plugging material is obtained by stirring at a stirring speed of 700 r / min for 30 s and then at a stirring speed of 1400 r / min for 90 s.

[0055] The aluminate cement is purchased from Zhengzhou Jianai in Henan, and the brand is CA50;

[0056] The high calcium mineral is high calcium fly ash, the average particle size is 18.9 μm, and the free calcium oxide content is 20% by weight;

[0057] The retarder is tartaric acid;

[0058] The fine aggregate is gangue powder, and the particle size is ≤1 mm;

[0059] The water reducing agent is a polycarboxylic acid water reducing agent.

[0060] Example 3

[0061] The formulation of the water plugging material composition in the example is shown in Table 1, taking the sum of the weights of the aluminate cement, the high calcium mineral and the fine aggregate as 100%.

[0062] The aluminate cement, the high calcium mineral and the fine aggregate are mixed uniformly, the water reducing agent and the retarder are added, the water is added according to the liquid-solid ratio shown in Table 1, and the water plugging material is obtained by stirring at a stirring speed of 700 r / min for 30 s and then at a stirring speed of 1400 r / min for 90 s.

[0063] The aluminate cement is purchased from Zhengzhou Jianai in Henan, and the brand is CA50;

[0064] The high calcium mineral is high calcium fly ash, the average particle size is 18.9 μm, and the free calcium oxide content is 40% by weight;

[0065] The retarder is tartaric acid;

[0066] The fine aggregate is gangue powder, and the particle size is ≤1 mm;

[0067] The water reducing agent is a polycarboxylic acid water reducing agent.

[0068] Example 4

[0069] The formulation of the water plugging material composition in the example is shown in Table 1, taking the sum of the weights of the aluminate cement, the high calcium mineral and the fine aggregate as 100%.

[0070] The aluminate cement, high calcium mineral and fine aggregate are mixed uniformly, and the water reducing agent and the retarder are added. The water is added according to the liquid-solid ratio shown in Table 1 below. The water plugging material is obtained by stirring at a stirring speed of 700 r / min for 30 s and then stirring at a stirring speed of 1400 r / min for 90 s.

[0071] The high calcium mineral is high calcium fly ash, and the average particle size is 18.9 μm. The free calcium oxide content is 30%.

[0072] The retarder is tartaric acid.

[0073] The fine aggregate is gangue powder, and the particle size is ≤1 mm.

[0074] The water reducing agent is polycarboxylic acid water reducing agent.

[0075] Example 5

[0076] The formulation of the water plugging material composition in the example is shown in Table 1 below, taking the sum of the weights of the aluminate cement, the high calcium mineral and the fine aggregate as 100%.

[0077] The aluminate cement, high calcium mineral and fine aggregate are mixed uniformly, and the water reducing agent and the retarder are added. The water is added according to the liquid-solid ratio shown in Table 1 below. The water plugging material is obtained by stirring at a stirring speed of 700 r / min for 30 s and then stirring at a stirring speed of 1400 r / min for 90 s.

[0078] The high calcium mineral is high calcium fly ash, and the average particle size is 18.9 μm. The free calcium oxide content is 5%.

[0079] The retarder is tartaric acid.

[0080] The fine aggregate is gangue powder, and the particle size is ≤1 mm.

[0081] The water reducing agent is polycarboxylic acid water reducing agent.

[0082] Comparative Example 1

[0083] The formulation of the water plugging material composition in the example is shown in Table 1 below, taking the sum of the weights of the aluminate cement, the high calcium mineral and the fine aggregate as 100%.

[0084] The aluminate cement, high calcium mineral and fine aggregate are mixed uniformly, and the water reducing agent and the retarder are added. The water is added according to the liquid-solid ratio shown in Table 1 below. The water plugging material is obtained by stirring at a stirring speed of 700 r / min for 30 s and then stirring at a stirring speed of 1400 r / min for 90 s.

[0085] Aluminate cement was purchased from Henan Zhengzhou Jianai, with brand CA50;

[0086] High calcium mineral was high calcium fly ash, with average particle size of 18.9 μm, and free calcium oxide content of 12% by weight;

[0087] Retarder was tartaric acid;

[0088] Fine aggregate was gangue powder, with particle size of ≤1 mm;

[0089] Water reducing agent was polycarboxylic acid water reducing agent.

[0090] Comparative Example 2

[0091] The formulation of the water plugging material composition in the present example is shown in Table 1, based on the sum of the weights of the aluminate cement, high calcium mineral and fine aggregate being 100%.

[0092] The aluminate cement, high calcium mineral and fine aggregate were mixed uniformly, and the retarder and water reducing agent were added. Water was added according to the liquid-solid ratio shown in Table 1 below. The mixture was first stirred slowly at a stirring speed of 700 r / min for 30 s, and then stirred quickly at a stirring speed of 1400 r / min for 90 s, to obtain the water plugging material.

[0093] Aluminate cement was purchased from Henan Zhengzhou Jianai, with brand CA50;

[0094] High calcium mineral was high calcium fly ash, with average particle size of 18.9 μm, and free calcium oxide content of 12% by weight;

[0095] Retarder was tartaric acid;

[0096] Fine aggregate was gangue powder, with particle size of ≤1 mm;

[0097] Water reducing agent was polycarboxylic acid water reducing agent.

[0098] Comparative Example 3 (using sulphoaluminate cement)

[0099] The formulation of the water plugging material composition in the present example is shown in Table 1, based on the sum of the weights of the sulphoaluminate cement, high calcium mineral and fine aggregate being 100%.

[0100] The sulphoaluminate cement, high calcium mineral and fine aggregate were mixed uniformly, and the retarder and water reducing agent were added. Water was added according to the liquid-solid ratio shown in Table 1 below. The mixture was first stirred slowly at a stirring speed of 700 r / min for 30 s, and then stirred quickly at a stirring speed of 1400 r / min for 90 s, to obtain the water plugging material.

[0101] Sulphoaluminate cement was purchased from Henan Zhengzhou Jianwen Special Material Technology Co., Ltd., with brand 42.5 grade;

[0102] The high-calcium mineral is high-calcium fly ash, with an average particle size of 18.9 μm and a free calcium oxide content of 12% by weight;

[0103] The retarder is tartaric acid;

[0104] The fine aggregate is gangue powder, with a particle size of ≤1 mm;

[0105] The water reducing agent is a polycarboxylic acid water reducing agent.

[0106] Comparative Example 4 (using a low-calcium mineral)

[0107] The formulation of the water plugging material composition in this example is shown in Table 1, based on the sum of the weights of the aluminate cement, low-calcium mineral and fine aggregate being 100%.

[0108] The aluminate cement, low-calcium mineral and fine aggregate are mixed uniformly, and the retarder and water reducing agent are added. Water is added according to the liquid-solid ratio shown in Table 1 below. The mixture is first stirred slowly at a stirring speed of 700 r / min for 30 s, and then stirred quickly at a stirring speed of 1400 r / min for 90 s, to obtain the water plugging material.

[0109] The aluminate cement is purchased from Henan Zhengzhou Jianai, with a brand of CA50;

[0110] The low-calcium mineral is low-calcium fly ash, with an average particle size of 15.5 μm and a free calcium oxide content of 0.15% by weight;

[0111] The retarder is tartaric acid;

[0112] The fine aggregate is gangue powder, with a particle size of ≤1 mm;

[0113] The water reducing agent is a polycarboxylic acid water reducing agent.

[0114] Comparative Example 5 (the retarder is boric acid)

[0115] The formulation of the water plugging material composition in this example is shown in Table 1, based on the sum of the weights of the aluminate cement, high-calcium mineral and fine aggregate being 100%.

[0116] The aluminate cement, high-calcium mineral and fine aggregate are mixed uniformly, and the retarder and water reducing agent are added. Water is added according to the liquid-solid ratio shown in Table 1 below. The mixture is first stirred slowly at a stirring speed of 700 r / min for 30 s, and then stirred quickly at a stirring speed of 1400 r / min for 90 s, to obtain the water plugging material.

[0117] The aluminate cement is purchased from Henan Zhengzhou Jianai, with a brand of CA50;

[0118] The high-calcium mineral is high-calcium fly ash, with an average particle size of 18.9 μm and a free calcium oxide content of 12% by weight;

[0119] The retarder is boric acid;

[0120] The fine aggregate is gangue powder with a particle size of ≤1mm.

[0121] The water reducing agent is a polycarboxylic acid water reducing agent.

[0122] Comparative Example 6

[0123] The formulation of the water plugging material composition in the example is shown in Table 1, with the sum of the weight of the aluminate cement, the high-calcium mineral and the fine aggregate being 100%.

[0124] The aluminate cement, the high-calcium mineral and the fine aggregate are mixed uniformly, and the retarder and the water reducing agent are added, and water is added according to the liquid-solid ratio shown in Table 1 below. The mixture is first stirred at a stirring speed of 700r / min for 30s, and then stirred at a stirring speed of 1400r / min for 90s, to obtain the water plugging material.

[0125] The aluminate cement is purchased from Zhengzhou Jianai in Henan, with a brand CA50;

[0126] The high-calcium mineral is high-calcium fly ash with an average particle size of 16.9μm and a free calcium oxide content of 45% by weight;

[0127] The retarder is tartaric acid;

[0128] The fine aggregate is gangue powder with a particle size of ≤1mm.

[0129] The water reducing agent is a polycarboxylic acid water reducing agent.

[0130] Table 1 Properties of water plugging materials prepared by different proportions of high-calcium mineral and aluminate cement

[0131]

[0132]

[0133] Note: In Table 1, the unit of the liquid-solid ratio is g / g.

[0134] As can be seen from Table 1, the water plugging material prepared by combining the high-calcium mineral containing a specific content of free calcium oxide with the aluminate cement, the retarder and the water reducing agent in a certain proportion according to the formulation of the example of the present application can well balance the retardation, high early strength and good fluidity, and the comprehensive performance is obviously better than that of the water plugging materials prepared under other proportion conditions.

[0135] Those skilled in the art can understand that, under the teaching of the present specification, some modifications or adjustments can be made to the present application. These modifications or adjustments should also be within the scope defined by the claims of the present application.

Claims

1. A composition of a high-flowability solid waste-based mine water-blocking material, characterized in that, The composition comprises aluminate cement, high-calcium minerals, fine aggregates, a retarder, and a water-reducing agent, and the following components are expressed in weight percentages, based on the sum of the weights of the aluminate cement, high-calcium minerals, and fine aggregates as 100%: Aluminate cement 4-20%, high-calcium minerals 10-80%, fine aggregates 10-80%, retarder 0.01-1%, water-reducing agent 0.01-1%; The free calcium oxide content in the high-calcium mineral is 5-40% by weight. The weight ratio of the aluminate cement to the high-calcium mineral is 2:5-16; The high-calcium mineral is selected from one or more of tourmaline slag, fly ash, gypsum, or limestone; The retarder is an organic acid containing a carboxyl group; The fine aggregate is selected from one or more of gangue powder, slag powder, and bottom slag powder.

2. The high-flow-rate solid waste-based mine water-blocking material composition according to claim 1, characterized in that, The retarder is selected from one or more of tartaric acid, citric acid, and salicylic acid.

3. The high-flowability solid waste-based mine water-blocking material composition according to any one of claims 1-2, characterized in that, The weight ratio of the aluminate cement to the high-calcium mineral is 1:3-5, and the weight percentage of the fine aggregate is 10%-60%.

4. The high-flow-rate solid waste-based mine water-blocking material composition according to claim 1, characterized in that, The water-reducing agent is selected from one or more of polycarboxylate water-reducing agents, naphthalene-based water-reducing agents, and aliphatic water-reducing agents.

5. A method for preparing a high-flowability solid waste-based mine water-blocking material, characterized in that, The process includes the following steps: mixing and stirring each component of the composition according to any one of claims 1-4 with water at a liquid-to-solid weight ratio of 0.2-1 to prepare the high-flow solid waste-based mine water-blocking material.

6. A high-flowability solid waste-based mine water-blocking material, characterized in that, It was prepared by the method described in claim 5.

7. The high-flowability solid waste-based mine water-blocking material according to claim 6, characterized in that, The viscosity of the solid waste-based mine water plugging material is <400MPa·S, the 2h compressive strength is ≥1MPa, the 1d compressive strength is ≥5MPa, and the 7d compressive strength is >8MPa.

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