Grouting material suitable for rapid plugging of water-rich stratum as well as preparation method and application of grouting material

Abstract

The invention discloses a grouting material suitable for rapid plugging of a water-rich stratum as well as a preparation method and application of the grouting material, and belongs to the technical field of grouting materials. The preparation raw materials comprise a component A and a component B, the component A comprises the following components in parts by mass: 20-80 parts of cement; 10-50 parts of a fly ash extract; 20 to 60 parts of water; the concrete admixture is prepared from the following components in parts by weight: 0.01 to 1 part of polycarboxylate superplasticizer, 0.025 to 0.05 part of polyacrylamide, 0.1 to 0.6 part of hydroxypropyl methyl cellulose, 0.5 to 1 part of disodium hydrogen phosphate and 1.5 to 4.5 parts of calcium metaaluminate. The component B is water glass, and the volume ratio of the component A to the component B is (1-5): 1. The grouting material provided by the invention has the properties of early strength, rapid setting, adjustable setting time, good fluidity, high flowing water retention rate and the like, and can meet the rapid plugging requirements of grouting of underground engineering such as tunnels, coal mines and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of grouting materials, and in particular relates to a grouting material suitable for rapid plugging of water-rich strata and a preparation method and application thereof. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] During the construction and operation of underground projects such as tunnels, coal mines, and subways, water inrush and gushing problems are often encountered. These water hazards not only affect the construction progress, but may also endanger the safety and stability of the project. Therefore, how to quickly and effectively block the water source in the water-rich strata has become a key technical problem in project construction and maintenance. At present, grouting plugging technology is one of the main means to deal with underground water inrush problems, and its core lies in the selection of suitable grouting materials.

[0004] However, traditional cement-based grouting materials have the following shortcomings: (1) Poor fluidity and difficulty in grouting construction. Traditional cement-based grouting materials usually use a high water-cement ratio to improve fluidity, but this will lead to a decrease in the strength of the material, making it difficult to meet the requirements of underground engineering for the mechanical properties of the plugging body. At the same time, high water-cement ratio slurries are prone to segregation and stratification in complex strata, and problems such as pipe blockage and uneven grouting often occur during the grouting process, affecting the plugging effect and construction efficiency. (2) Insufficient early strength and rapid setting performance, making it difficult to meet the plugging requirements under dynamic water conditions. Ordinary cement-based grouting materials have a relatively long setting time and cannot be quickly formed and reach the required early strength in a dynamic water environment, which makes the slurry easily diluted or washed away by water flow during injection, resulting in a significant reduction in the plugging effect. Especially in emergency situations such as water inrush in tunnels and mines, the need for rapid plugging is particularly urgent, and traditional materials are difficult to meet this requirement. (3) Low dynamic water retention rate and poor anti-scouring performance. Under dynamic water conditions, grouting materials are easily washed away by water flow, resulting in the inability to ensure the integrity and stability of the plugging body. This is a common challenge faced by traditional cement-based materials in dynamic water environments, which directly affects the durability and reliability of the plugging.

[0005] Patent CN117776659A discloses a green plugging material for karst dynamic water, which is composed of component A and component B; in parts by weight, the component A includes: sulphoaluminate cement, lightly burned magnesium oxide, boric acid and water; the component B includes: hydroxypropyl methylcellulose, polyacrylamide, potassium dihydrogen phosphate, triethanolamine, lithium carbonate and water. It has high scour resistance, and the retention rate of the slurry can reach 95% at a water speed of 1m / s; it can achieve ultra-short initial setting, the initial setting time is shortened to 30s, the slurry is paste-like after initial setting, and the final setting time is controllable, taking into account both resistance to dynamic water and long-distance grouting. However, the mechanical properties of the material are not high, with a 3-day compressive strength of 7MPa and a 28-day compressive strength of only 11.2MPa, which limits its scope of application.

[0006] Therefore, there is an urgent need for a grouting material with good fluidity, early strength, rapid setting, and high dynamic water retention rate to meet the engineering needs of rapid plugging of water-rich strata. Summary of the invention

[0007] In order to address the deficiencies in the prior art, the purpose of the present invention is to provide a grouting material suitable for rapid plugging of water-rich formations, and a preparation method and application thereof. The modified cement-based grouting material provided by the present invention has good fluidity, early strength and rapid setting, and a high dynamic water retention rate, which meets the engineering requirements for rapid plugging of water-rich formations.

[0008] In order to achieve the above object, the technical solution of the present invention is:

[0009] The first aspect of the present invention provides a grouting material suitable for rapid plugging of water-rich formations, wherein the raw materials for preparing the grouting material include component A and component B;

[0010] Among them, the component A, calculated by mass, includes 20 to 80 parts of cement; 10 to 50 parts of fly ash extract; 20 to 60 parts of water; 0.01 to 1 part of polycarboxylic acid water reducer, 0.025 to 0.05 parts of polyacrylamide, 0.1 to 0.6 parts of hydroxypropyl methylcellulose, 0.5 to 1 part of disodium hydrogen phosphate, and 1.5 to 4.5 parts of calcium aluminate; the component B is water glass, and the volume ratio of component A to component B is 1 to 5:1.

[0011] The grouting material suitable for rapid plugging of water-rich strata provided by the present invention has the properties of early strength, rapid setting with adjustable setting time, good fluidity, high dynamic water retention rate, etc., and can meet the needs of rapid grouting and plugging in underground projects such as tunnels and coal mines.

[0012] The present invention introduces fly ash extract to replace part of silicate cement. Since the extract is in the form of fine spherical particles, its structure acts as a ball effect in the slurry, reducing the friction resistance between the particles and significantly improving the fluidity of the slurry. While maintaining the high strength characteristics of traditional low water-cement ratio cement, the grouting material has significantly improved its fluidity, meeting the strict requirements of water-rich underground projects on material performance and achieving an excellent balance between fluidity and strength.

[0013] The present invention forms a grouting material A component with silicate cement, fly ash extract and water, and simultaneously adds a polycarboxylic acid water reducer to further improve the fluidity of the grouting material and give the material good workability and mechanical strength; adds polyacrylamide and hydroxypropyl methylcellulose to improve the injectability and anti-scouring ability of the slurry and meet the performance requirements of dynamic water plugging; adds calcium aluminate to make the material expand moderately and further improve the volume stability and tight sealing effect; and by adjusting the volume ratio of the added amount of the disodium hydrogen phosphate retarder to the water glass cementitious material, the setting time of the grouting material can be effectively controlled, thereby adapting to the requirements of different geological conditions and grouting working conditions.

[0014] It should be noted that the grouting material suitable for rapid plugging of water-rich strata provided by the present invention has the characteristics of rapid setting and needs to be in a flowable state when used. Therefore, the grouting material suitable for rapid plugging of water-rich strata needs to be prepared and used immediately, and component A and component B are mixed when used.

[0015] In some embodiments of the present invention, the cement is silicate cement. Optionally, the silicate cement is commercially available PO 42.5 ordinary silicate cement, wherein SiO 2 、Al 2 O 3 And the total mass fraction of CaO>90%.

[0016] In some embodiments of the present invention, the fly ash extract is ultrafine fly ash particles, the particle size of the fly ash extract is 0.2 μm-10 μm, and the density is 2-3 g / cm 3 .

[0017] It should be noted that the term fly ash extract refers to a powder composed of spherical particles extracted from fly ash by flotation. The extract has a relatively smooth surface and a dense internal structure. The main component is SiO 2 、Al 2 O 3 and Fe 2 O 3 The fly ash extract is not composed of spherical particles of a single particle size, but because it is extracted by flotation, it is composed of spherical particles with a particle size ranging from 0.2 μm to 10 μm.

[0018] In some embodiments of the present invention, the molecular weight of the hydroxypropyl methylcellulose is 100,000-200,000.

[0019] In some embodiments of the present invention, the molecular weight of the polyacrylamide is 5-7 million.

[0020] It should be noted that the molecular weight of hydroxypropyl methylcellulose and the molecular weight of polyacrylamide in the present invention have little effect on the performance of the obtained grouting material suitable for rapid plugging of water-rich formations. When the molecular weights of the two are within the above range, the obtained grouting material suitable for rapid plugging of water-rich formations has excellent performance.

[0021] In some embodiments of the present invention, the modulus of the water glass is 3-3.5, the Baume degree is 18-22, and the density is 1-1.5 g / cm 3 .

[0022] It should be noted that the water glass is commercially available liquid water glass, such as a water glass having a modulus of 3.3, a Baume degree of 20, and a density of 1.38 g / cm 3 water glass.

[0023] In some embodiments of the present invention, the component A includes, by mass, 40 to 60 parts of silicate cement; 10 to 30 parts of fly ash extract; 20 to 50 parts of water; 0.4 to 0.8 parts of polycarboxylic acid water reducer, 0.025 to 0.05 parts of polyacrylamide, 0.1 to 0.5 parts of hydroxypropyl methylcellulose, 0.5 to 0.7 parts of disodium hydrogen phosphate, and 1.5 to 2 parts of calcium aluminate.

[0024] In some embodiments of the present invention, the component A includes, by mass, 40 to 50 parts of silicate cement; 10 to 20 parts of fly ash extract; 20 to 40 parts of water; 0.4 to 0.8 parts of polycarboxylic acid water reducer, 0.025 to 0.04 parts of polyacrylamide, 0.2 to 0.3 parts of hydroxypropyl methylcellulose, 0.5 to 0.6 parts of disodium hydrogen phosphate, and 1.5 to 2 parts of calcium aluminate.

[0025] In some embodiments of the present invention, the volume ratio of component A to component B is 1 to 5:1.

[0026] The second aspect of the present invention provides a method for preparing the above-mentioned grouting material suitable for rapid plugging of water-rich formations, comprising:

[0027] Mixing silicate cement, fly ash extract, water, polycarboxylic acid water reducer, polyacrylamide, hydroxypropyl methylcellulose, disodium hydrogen phosphate and calcium metaaluminate to obtain component A slurry;

[0028] The A component slurry is mixed with water glass to obtain a grouting material suitable for rapid plugging of water-rich formations.

[0029] It should be noted that the grouting material suitable for rapid plugging of water-rich strata provided by the present invention has the characteristics of rapid setting and needs to be in a flowable state when used. Therefore, the grouting material suitable for rapid plugging of water-rich strata needs to be prepared and used immediately, and component A and component B are mixed when used.

[0030] The third aspect of the present invention provides an application of the above-mentioned grouting material suitable for rapid plugging of water-rich strata or the grouting material suitable for rapid plugging of water-rich strata prepared by the above-mentioned preparation method in plugging sudden water in underground engineering.

[0031] The fourth aspect of the present invention provides a method for sealing sudden water gushing in underground engineering, comprising the following steps: mixing component A and component B, and performing pressure grouting on a water outlet and its surroundings until there is no water seepage or water gushing within three minutes after the water outlet is sealed, and the injected slurry is the above-mentioned grouting material suitable for rapid sealing of water-rich formations or the grouting material suitable for rapid sealing of water-rich formations prepared by the above-mentioned preparation method.

[0032] The beneficial effects of the present invention are:

[0033] Compared with the prior art, the grouting material suitable for rapid plugging of water-rich strata provided by the present invention makes full use of fly ash extracts from industrial waste, realizing the recycling of resources. In addition, by using specific content components, the components have good interactions, so that the grouting material suitable for rapid plugging of water-rich strata has the properties of early strength, rapid setting and adjustable setting time, good fluidity, high dynamic water retention rate, etc., which can meet the needs of rapid grouting and plugging of underground projects such as tunnels and coal mines. The experimental results show that the flow time of component A of the grouting material suitable for rapid plugging of water-rich strata provided by the present invention is as low as 5.19s, the initial setting time is reduced to 16.5s, the 3-day compressive strength is as high as 25.3MPa, and the retention rate can reach 93% at a water speed of 0.8-1m / s.

[0034] The parameters in the preparation process of the grouting material suitable for rapid plugging of water-rich formations provided by the present invention are easy to control, the process is simple, and large-scale promotion and application are easy to achieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0036] Figure 1 This is a composition diagram of the grouting material suitable for rapid plugging of water-rich formations prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0038] The silicate cement used in the following examples and comparative examples is PO 42.5 ordinary silicate cement, the fly ash extract is ultra-fine fly ash particles, the particle size of the fly ash extract is 0.2μm-10μm, and the density is 2-3g / cm 3 The modulus of water glass is 3.3, the Baume degree is 20, and the density is 1.38g / cm 3 The molecular weight of polyacrylamide is 6 million. The molecular weight of hydroxypropyl methylcellulose is 150,000.

[0039] Example 1

[0040] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0041] (1) Preparation of component A slurry: by weight, take 40 parts of silicate cement, 20 parts of fly ash extract, 25 parts of water, 0.4 parts of polycarboxylic acid water reducer, 0.025 parts of polyacrylamide, 0.2 parts of hydroxypropyl methylcellulose, 2 parts of calcium aluminate, and 0.6 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0042] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0043] Example 2

[0044] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0045] (1) Preparation of component A slurry: by weight, take 50 parts of silicate cement, 10 parts of fly ash extract, 30 parts of water, 0.6 parts of polycarboxylic acid water reducer, 0.025 parts of polyacrylamide, 0.2 parts of hydroxypropyl methylcellulose, 1.5 parts of calcium aluminate, and 0.5 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0046] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0047] Example 3

[0048] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0049] (1) Preparation of component A slurry: by weight, take 40 parts of silicate cement, 10 parts of fly ash extract, 20 parts of water, 0.8 parts of polycarboxylic acid water reducer, 0.04 parts of polyacrylamide, 0.3 parts of hydroxypropyl methylcellulose, 2 parts of calcium aluminate, and 0.5 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0050] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0051] Comparative Example 1

[0052] A modified cement-based grouting material suitable for rapid plugging of water-rich strata comprises the following steps:

[0053] (1) Preparation of component A slurry: by weight, take 60 parts of silicate cement, 25 parts of water, 0.4 parts of polycarboxylic acid water reducer, 0.025 parts of polyacrylamide, 0.2 parts of hydroxypropyl methylcellulose, 2 parts of calcium aluminate, and 0.6 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0054] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0055] Comparative Example 2

[0056] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0057] (1) Preparation of component A slurry: by weight, take 40 parts of silicate cement, 20 parts of fly ash extract, 25 parts of water, 0.4 parts of polycarboxylic acid water reducer, 0.225 parts of hydroxypropyl methylcellulose, 2 parts of calcium aluminate, and 0.6 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0058] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0059] Comparative Example 3

[0060] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0061] (1) Preparation of component A slurry: by weight, take 40 parts of silicate cement, 20 parts of fly ash extract, 25 parts of water, 0.4 parts of polycarboxylic acid water reducer, 0.225 parts of polyacrylamide, 2 parts of calcium aluminate, and 0.6 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0062] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0063] Comparative Example 4

[0064] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0065] (1) Preparation of component A slurry: by weight, take 40 parts of silicate cement, 20 parts of fly ash extract, 25 parts of water, 0.4 parts of polycarboxylic acid water reducer, 0.025 parts of polyacrylamide, 0.2 parts of hydroxypropyl methylcellulose, and 0.6 parts of disodium hydrogen phosphate, mix and stir evenly to obtain component A slurry.

[0066] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0067] Comparative Example 5

[0068] A modified cement-based grouting material suitable for rapid plugging of water-rich strata, the preparation method of which comprises the following steps:

[0069] (1) Preparation of component A slurry: by weight, take 40 parts of silicate cement, 20 parts of fly ash extract, 25 parts of water, 0.4 parts of polycarboxylic acid water reducer, 0.025 parts of polyacrylamide, 0.2 parts of hydroxypropyl methylcellulose, and 2 parts of calcium aluminate, mix and stir evenly to obtain component A slurry.

[0070] (2) The A component slurry and the B component (water glass) are mixed and stirred in a volume ratio of 2:1 to obtain a modified cement-based grouting material, which can be used for grouting.

[0071] Experimental Example 1

[0072] The properties of the modified cement-based grouting materials prepared in the examples and comparative examples were tested, and the testing method was as follows:

[0073] The flow time of the obtained A component slurry was measured by Tu 6 cup: Pour the A component slurry into Tu 6 cup, and make sure that the liquid surface is flush with the upper edge of Tu 6 cup. Quickly open the orifice valve at the bottom of Tu 6 cup to let the slurry flow out through the hole at the bottom of the cup, and start the stopwatch at the same time. Observe the moment when the slurry flows out of Tu 6 cup, stop the stopwatch immediately, and record the total flow time. Repeat 3 times for each group and take the average value to verify its fluidity.

[0074] The obtained grouting materials are subjected to initial setting test, test block preparation, compressive strength test and anti-scour performance test.

[0075] Pour the obtained component A slurry and water glass into two beakers according to the specified volume ratio, then pour the component A slurry into the beaker filled with water glass, and immediately pour the mixture of the two into another beaker, repeat the alternating mixing until the slurry can no longer be poured or the flow is obviously obstructed. Record the time, which is the initial setting time. Repeat each group 3 times and take the average value as the final result.

[0076] The obtained modified cement-based grouting material was poured into a 40mm×40mm×40mm cubic mold for specimen preparation. The modified cement-based grouting material was prepared into a 40mm×40mm×40mm standard cube and then cured for 3 days. The compressive strength was obtained by indoor uniaxial compression test. Each group was repeated 3 times and the average value was taken as the final result.

[0077] The obtained modified cement-based grouting material is poured onto the test device and flushed with dynamic water at a set flow rate of 0.8m / s-1.0m / s for a certain time (more than 3min). The change in slurry mass before and after is measured to obtain the dynamic water retention rate, thereby evaluating the anti-scouring performance.

[0078] After testing, the properties of the modified cement-based grouting materials obtained in the examples and comparative examples are shown in Table 1.

[0079] Table 1 Performance of modified cement-based grouting materials obtained in Examples and Comparative Examples

[0080]

[0081] As shown in Table 1, fly ash extract affects the flow time and dynamic water retention rate of component A. The partial replacement of cement with fly ash extract can improve the fluidity of the slurry, ensuring that the grouting material maintains the high strength characteristics of traditional low water-cement ratio cement while its fluidity is significantly improved, meeting the strict requirements of water-rich underground projects on material performance, and achieving an excellent balance between fluidity and strength. Adding polyacrylamide and hydroxypropyl methylcellulose can improve the injectability and anti-scouring ability of the slurry, reduce the initial setting time, and meet the performance requirements of dynamic water plugging. Adding calcium aluminate can cause the material to expand moderately, which can further improve the volume stability and tight sealing effect. Adding disodium hydrogen phosphate retarder can effectively control the setting time of the grouting material, thereby adapting to the needs of different geological conditions and grouting conditions.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grouting material suitable for rapid plugging of water-rich formations, characterized in that: The raw materials for its preparation include component A and component B; Among them, the component A, calculated by mass, includes 20 to 80 parts of cement; 10 to 50 parts of fly ash extract; 20 to 60 parts of water; 0.01 to 1 part of polycarboxylic acid water reducer, 0.025 to 0.05 parts of polyacrylamide, 0.1 to 0.6 parts of hydroxypropyl methylcellulose, 0.5 to 1 part of disodium hydrogen phosphate, and 1.5 to 4.5 parts of calcium aluminate; the component B is water glass, and the volume ratio of component A to component B is 1 to 5:

1.

2. The grouting material suitable for rapid plugging of water-rich formations according to claim 1, characterized in that: The cement is Portland cement; The particle size of the fly ash extract is 0.2 μm-10 μm, and the density is 2-3 g / cm 3 .

3. The grouting material suitable for rapid plugging of water-rich formations according to claim 1, characterized in that: The molecular weight of the hydroxypropyl methylcellulose is 100,000-200,000; The molecular weight of the polyacrylamide is 5-7 million.

4. The grouting material suitable for rapid plugging of water-rich formations according to claim 1, characterized in that: The water glass has a modulus of 3-3.5, a Baume degree of 18-22, and a density of 1-1.5 g / cm 3 .

5. The grouting material suitable for rapid plugging of water-rich formations according to claim 1, characterized in that: The component A comprises, by mass, 40 to 60 parts of silicate cement, 10 to 30 parts of fly ash extract, 20 to 50 parts of water, 0.4 to 0.8 parts of polycarboxylic acid water reducer, 0.025 to 0.05 parts of polyacrylamide, 0.1 to 0.5 parts of hydroxypropyl methylcellulose, 0.5 to 0.7 parts of disodium hydrogen phosphate, and 1.5 to 2 parts of calcium aluminate.

6. The grouting material suitable for rapid plugging of water-rich formations according to claim 1, characterized in that: The component A comprises, by mass, 40 to 50 parts of silicate cement, 10 to 20 parts of fly ash extract, 20 to 40 parts of water, 0.4 to 0.8 parts of polycarboxylic acid water reducer, 0.025 to 0.04 parts of polyacrylamide, 0.2 to 0.3 parts of hydroxypropyl methylcellulose, 0.5 to 0.6 parts of disodium hydrogen phosphate, and 1.5 to 2 parts of calcium aluminate.

7. The grouting material suitable for rapid plugging of water-rich formations according to claim 1, characterized in that: The volume ratio of component A to component B is 1 to 5:

1.

8. A method for preparing a grouting material suitable for rapid plugging of water-rich formations according to any one of claims 1 to 7, characterized in that: include: Mixing cement, fly ash extract, water, polycarboxylate water reducer, polyacrylamide, hydroxypropyl methylcellulose, disodium hydrogen phosphate and calcium aluminate to obtain component A slurry; The A component slurry is mixed with water glass to obtain a grouting material suitable for rapid plugging of water-rich formations.

9. Use of the grouting material suitable for rapid plugging of water-rich strata as described in any one of claims 1 to 7 or the grouting material suitable for rapid plugging of water-rich strata prepared by the preparation method as described in claim 8 in plugging sudden water in underground engineering.

10. A method for blocking sudden water inrush in underground engineering, characterized in that: The method comprises the following steps: after mixing component A and component B, pressure grouting is performed on the water outlet and its surroundings until there is no water seepage or water gushing within three minutes after the water outlet is blocked, and the injected slurry is the grouting material suitable for rapid blocking of water-rich formations as described in any one of claims 1 to 7 or the grouting material suitable for rapid blocking of water-rich formations prepared by the preparation method described in claim 8.

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