High-temperature water gushing plugging dynamic water anti-dispersion grouting material and preparation method

Abstract

The application belongs to the field of underground engineering grouting materials, and provides a dynamic water anti-dispersion grouting material for high-temperature gushing water plugging and a preparation method, which is composed of the following raw materials in parts by mass: silicate cement 100 parts by mass, anti-dispersion performance optimizing agent 5.4-13 parts by mass, expanding agent 2.4-6 parts by mass, coagulation accelerator 3.5-13 parts by mass, high-efficiency water reducing agent 0.15-0.91 parts by mass, and mixing water 35-45 parts by mass. The application introduces mung bean starch to improve the cohesiveness and dynamic water anti-dispersion of the grouting material at high temperatures, realizes better plugging effect under unfavorable engineering conditions (the temperature of sudden gushing water is 70-90 DEG C), and solves the technical predicament that the anti-dispersion of traditional dynamic water anti-dispersion cement decreases with the increase of temperature.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of grouting materials for underground engineering, and relates to a dynamic water anti-dispersion grouting material for high-temperature gushing water plugging and a preparation method. BACKGROUND

[0002] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the general background of the application and does not necessarily constitute an admission by the patent applicant(s) that this information constitutes prior art.

[0003] Fissured rock mass rich in high-temperature groundwater becomes a main source of geological disasters in the process of engineering construction, and high-temperature fissure type gushing water disasters are prone to occur during construction. During the occurrence of such disasters, the water temperature is often as high as 70-90 DEG C, the water pressure is as high as 5-20 MPa, and the fissure channel is developed.

[0004] A series of researches have been carried out at home and abroad around the dynamic water anti-dispersion cement, and it is determined that the components of the dynamic water anti-dispersion cement basically include a dynamic water anti-dispersion agent, an expansion component, a coagulation component, a water reducing agent and cement, and the anti-dispersion plugging under the dynamic water condition is basically realized. However, heat exchange between the slurry and the gushing water often occurs during the high-temperature gushing water grouting plugging process, which significantly affects the gel solidification process of the cement-based rapid-setting grouting material, and the anti-dispersion agent such as polyacrylamide will have a molecular chain depolymerization reaction under the water temperature environment as high as 60-100 DEG C, so that it loses the original anti-dispersion performance. In addition, there is no coordinated solution to control the cement setting rate and volume micro-expansion under the high-temperature state at present, which hinders the further application of the grouting material in the high-temperature gushing water grouting engineering scene. Therefore, it is urgent to develop a grouting material with better slurry anti-dispersion and stone strength under high temperature. SUMMARY

[0005] In order to solve the above problems, improve the anti-dispersion effect of the grouting material under high-temperature gushing water and realize the rapid setting and micro-expansion of the grouting material under high temperature, the application provides a dynamic water anti-dispersion grouting material for high-temperature gushing water plugging and a preparation method. The grouting material has good stone strength and dynamic water anti-dispersion performance, realizes volume micro-expansion and adjustable setting time of the grouting material, and most importantly, the grouting material can have better plugging performance under the high-temperature gushing water environment, which is beneficial to realize the gushing water plugging treatment of the high-temperature fractured zone.

[0006] In order to achieve the above purpose, the application adopts the following technical scheme:

[0007] The first aspect of the present application provides a high-temperature gushing water plugging dynamic water anti-dispersion grouting material, which is composed of the following raw materials in mass parts: silicate cement 100 parts by mass, anti-dispersion performance optimizing agent 5.4-13 parts by mass, expanding agent 2.4-6 parts by mass, accelerating activator 3.5-13 parts by mass, high-efficiency water reducing agent 0.15-0.91 parts by mass, and mixing water 35-45 parts by mass;

[0008] The anti-dispersion performance optimizing agent comprises: A component and B component, and the mass ratio of the A component to the B component is (3.83-11.05):(0.67-1.95);

[0009] The A component is prepared by the following method: mixing lotus root starch, silane coupling agent modified bentonite and borax, ball milling to obtain a composite powder; then adding xanthan gum, sodium carboxymethyl starch and acrylic acid, and mixing uniformly to obtain the A component;

[0010] The B component is prepared by the following method: uniformly mixing tannic acid powder and yellow dextrin, then spraying an ethanol solution of ethyl cellulose, stirring to a preset particle size, and then obtaining coated tannic acid;

[0011] The activating agent is obtained by uniformly mixing ammonium ferric citrate, potassium persulfate and sodium bicarbonate;

[0012] The B component is obtained by uniformly mixing the activating agent and the coated tannic acid.

[0013] In daily life, lotus root starch needs to be brewed by first adding a certain amount of normal temperature water to make the lotus root starch uniformly dispersed, then using 100 DEG C boiling water to brew and rapidly stirring, so as to obtain the crystal lotus root starch in the form of viscous paste. Based on this, the present application provides a grouting plugging scheme for high-temperature gushing water, i.e. lotus root starch is added into the dynamic water anti-dispersion cement as a dynamic water anti-dispersion component. When encountering high-temperature gushing water, the hydrogen bond between the starch grain crystal and the amorphous state starch molecules in the lotus root starch is broken to occur gelatinization in the high-temperature dynamic water, which plays a better dynamic water plugging effect at high temperature. Meanwhile, in order to solve the problems that the gelatinization temperature of lotus root starch is often higher than the temperature of gushing water, and the lotus root starch is difficult to be fully gelatinized due to agglomeration during the grouting plugging process, the present application modifies the lotus root starch, and the anti-dispersion performance optimizing agent obtained by the modification can play a good gelatinization effect in the common temperature range of high-temperature gushing water, so that the prepared grouting material has good rock strength and dynamic water anti-dispersion performance, and meanwhile realizes the performance of micro-expansion of the grouting material, adjustable setting time and the like.

[0014] The second aspect of the present application provides a preparation method of a high-temperature gushing water plugging dynamic water anti-dispersion grouting material, comprising the following steps:

[0015] The A component and the B component are uniformly mixed to obtain the anti-dispersion performance optimizing agent;

[0016] Mixing cement, expanding agent, coagulation accelerator and water reducing agent uniformly, adding water, mixing uniformly, obtaining mixed slurry;

[0017] Mixing the mixed slurry with the anti-dispersion performance optimizing agent uniformly, and the anti-dispersion performance optimizing agent is obtained.

[0018] Advantages of the present application

[0019] (1) The anti-dispersion performance optimizing agent of the present application introduces lotus root powder, which has better cohesiveness and hydrodynamic anti-dispersion performance at high temperature, achieving better plugging effect under unfavorable engineering conditions (burst water temperature is 70-90 DEG C), solving the technical difficulties that the anti-dispersion performance of traditional hydrodynamic anti-dispersion cement decreases with the increase of temperature. Through the coupling effect of lotus root powder and modified bentonite, the lotus root powder is gelatinized to fill the pore of cement gel skeleton to form a flexible gel matrix during hardening, which has better plugging effect on micro cracks, and the bentonite provides a layered structure to adsorb starch molecules, and also reacts with portland cement to form a rigid skeleton in the form of lamella; the hydroxyl group (-OH) of lotus root powder and the silicon-oxygen group (-Si-O-) of bentonite form hydrogen bonds, and the cation (sodium ion Na + / calcium ion Ca 2+ ) of bentonite and the carboxyl group (-COOH) of lotus root powder form ionic crosslinking, thereby enhancing the interfacial properties between the liquid phase and the solid phase of the lotus root powder modified hydrodynamic anti-dispersion cement, and the phase separation is not easy to occur at high temperature, so that the hydrodynamic anti-dispersion performance is better. By modifying bentonite with silane coupling agent, silanol (≡Si-OH) is formed by hydrolysis of KH-570, and reacts with the interlayer aluminum-oxygen octahedral layer (Al-OH) of bentonite to form stable aluminum-silicon oxygen bond (Si-O-Al) covalent bond, so that the organic phase and the inorganic phase are well combined, which is helpful to the development of later strength. In addition, at low temperature, the carboxyl group of the acrylic monomer adsorbs free water molecules through hydrogen bonds, reducing the contact angle of the liquid, which can improve the low-temperature pumpability of the slurry, and at high temperature, the carboxyl group dissociates into polyanion polymer chains, which ionically crosslink with the calcium ions in the interlayer of bentonite to form a hydrogel-like network with microporous structure, reducing the erosion rate of high-temperature water on unhydrated cement particles. In addition, the hydrophilic monomer (acrylic acid) is grafted onto the starch molecule chain of lotus root powder, which combines lotus root powder with monomers, and under the catalysis of initiator (potassium persulfate), a hydrogel-like structure is formed at high temperature, further increasing the swelling property at low temperature, so that the lotus root powder with a higher gelatinization temperature (above 90 DEG C) has good gelatinization effect within the common temperature range of high-temperature water (burst water temperature is 70-90 DEG C).

[0020] (2) The modifier (xanthan gum) of modified sago can instantaneously thicken. Xanthan gum has stability at high temperature and will not hydrolyze in the high-temperature water inrush plugging working condition. Its unique galactose side chain stretches and swells in the high-temperature flowing water and fuses with the layered structure of bentonite. Sago and xanthan gum interact through hydrogen bonds to build a viscous fluid skeleton in the flowing water. Meanwhile, the hydroxyl and carboxyl groups in the skeleton can form chemical coordination bonds with calcium ions (Ca 2+ ), aluminum ions (Al 3+ ) and iron ions (Fe 3+ ) in the cement components and crosslink the hydration products together, thereby improving the dispersion resistance of the slurry and significantly outperforming xanthan gum and cellulose. The sodium carboxymethyl starch introduces strong ionic carboxymethyl groups (-CH2COO - -), which plays a double-layer repulsion effect between cement particles, is conducive to the dispersion of cement and relieves the flocculation and sedimentation of cement in the high-temperature flowing water environment. The higher the reaction temperature, the more obvious the effect, so the dispersion effect is better than that in the normal temperature environment. In addition, the tetraborate ions (B4O7 2- ) of boric acid are hydrolyzed to generate active hydrogen borate ([B(OH)4] - ) in the water environment. The boric acid forms a boric acid diester bond with the hydroxyl groups on the molecular chains of sago and xanthan gum. The performance remains unchanged at low temperatures, but when the temperature of the water inrush is above 60°C, the bond hydrolysis rate increases rapidly, rapidly destroying the hydrogen bond network of the starch crystal region and reducing the gelatinization temperature of sago. At the same time, boric acid can be adsorbed on the surface of magnesium oxide particles to inhibit early hydration and prevent the premature reaction of the swelling agent, which results in poor micro-expansion effect in the later stage.

[0021] (3) Ethyl cellulose forms a reticular film structure in ethanol solvent, and after drying, a continuous and dense hydrophobic layer, i.e., a coating layer, is formed on the surface of tannic acid particles. The coating layer can effectively block the penetration of water molecules at low temperatures, so that the tannic acid remains inert during the grouting pumping stage and avoids the pre-reaction with calcium ions in the cement system, which leads to the failure of the accelerating component. Yellow dextrin, as a bio-based pore-forming agent, is uniformly dispersed in the coating layer. Its degradation product, glucose, competes with dissolved oxygen in the water inrush to reduce the inhibition of the oxidation environment of the grouting area on the activity of tannic acid. When the water temperature is higher than 60°C, the ethyl cellulose coating is dissolved and destroyed, at which time the tannic acid is released, and the Fe 3+It forms a coordination network with tannic acid, combining with tannic acid to form a strong quick-setting agent, shortening the setting time of cement. Simultaneously, potassium persulfate catalyzes the oxidative cross-linking of starch, improving the resistance to dispersibility in dynamic water. In this system, sodium bicarbonate plays different regulatory roles at different temperatures. At low temperatures, the carbonate ions generated by dissolution preferentially form calcium carbonate microcrystals with calcium ions, reducing the competitive consumption of iron ions in ferric ammonium citrate by calcium ions. At high temperatures, it can decompose, regulating the pH value of the cement system to prevent it from becoming too high or too low. This invention separately encapsulates the dynamic water anti-dispersibility component and the high-temperature activating component, preventing premature reaction and achieving excellent mixing and pumping performance at low temperatures. It avoids the slow reaction between the activating component and the dynamic water anti-dispersibility component. Upon contact with high-temperature fissure water, it can rapidly activate the activating component and react quickly with the dynamic water anti-dispersibility component to form a viscous network structure with a certain strength, which is beneficial for rapid cement hydration, thus achieving a good high-temperature dynamic water sealing effect. The material packaging is simple, the construction process is easy, and it has good engineering operability.

[0022] (4) This invention employs a calcium-magnesium composite expansion source, exhibiting bimodal micro-expansion characteristics in practical engineering applications. Calcium oxide, upon contact with water, hydrates to form calcium hydroxide (Ca(OH)2), providing immediate expansion within 5-24 hours to compensate for the plastic shrinkage of the grout. Meanwhile, the magnesium oxide surface contacts boric acid, delaying activation and causing it to expand slowly over 3-7 days, compensating for the shrinkage during cement hardening, resulting in minimal system shrinkage while ensuring the strength and durability of the grouting seal. To facilitate rapid solidification of the grout in high-temperature dynamic water sealing projects, this invention adds an aluminum sulfate-silica fume system as a co-activating agent component, playing a synergistic activating role. Sulfoaluminate cement rapidly hydrolyzes in an alkaline environment, releasing Ca... 2+ Al 3+ , sulfate (SO4 2- The plasma rapidly generates prismatic ettringite precipitates (AFt), providing early strength. The addition of nano-silica fume further accelerates early hydration, distributing evenly throughout the grout and providing nucleation sites for cement particle hydration, filling pores in the cementitious skeleton, and accelerating the nucleation of calcium silicate hydrate (CSH) gel, shortening the cement hydration induction period. This is particularly advantageous under dynamic water sealing conditions with high flow rates and pressures. The alkali activator (water glass) maintains the alkaline environment of the cement grout, preventing the transformation of ettringite to monosulfide ettringite, preventing excessive volume expansion that could lead to internal cracks, and simultaneously generating sodium aluminosilicate hydrate (NASH) gel as an inorganic binder skeleton to fill ettringite pores, solving the problem of long-term strength reduction in sulfoaluminate cement and lowering the strength of grouting. To prevent the instantaneous setting of sulfoaluminate cement during early grouting, sodium gluconate is added, which preferentially adsorbs onto the surface of tricalcium silicate (C3S), preventing Ca2+ formation. 2+Fast dissolution, control the crystal growth axis direction, reduce the expansion stress concentration.

[0023] (5) In the actual application process of engineering, the easily reactive accelerating activator is physically isolated from the cement-based grouting material to avoid early hydration during transportation. In the grouting stage, 0.8 MPa pressure mixing is adopted, the stirring is more uniform, and the risk of pipe blockage is reduced. The three-hole gradient grouting process is more suitable for the working conditions of strong water flow and high temperature gushing water, and the grouting plugging effect is more significant. The upstream adopts high-concentration fast-setting slurry, the nucleation rate of ettringite is greatly accelerated, and a barrier against water impact is built in a short time to eliminate most of the water flow kinetic energy of high-temperature and high-pressure fracture gushing water and reduce the grouting plugging pressure; the material in the main grouting hole is not adjusted, so that the material realizes the dense filling of cavities and cracks in the plastic flow period by using its swelling and pasting effect; the basalt fiber in the downstream hole forms a three-dimensional network skeleton in the water-resistant cement system to improve the high-temperature water impact resistance of the slurry.

[0024] (6) The preparation method is simple, practical and easy to popularize. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description, explain the application. The exemplary embodiments of the application, and their description, are not intended to be an undue limitation on the scope of this application but serve as a primer for the same.

[0026] Figure 1 Is the morphology of lotus root powder before grinding in Example 1 of the application.

[0027] Figure 2 Is the anti-dispersion experiment effect diagram of the water-resistant grouting material for high-temperature gushing water plugging in Example 1 of the application injected into 80 DEG C static water, wherein a. 80 DEG C hot water, b. the slurry does not disperse at high temperature.

[0028] Figure 3 Is the water-resistant grouting experiment effect diagram of the water-resistant grouting material for high-temperature gushing water plugging in Example 1 of the application under the scouring of 80 DEG C high-temperature water, wherein a. 80 DEG C hot water, b. pour at a speed of 6L / s at a height of 50 cm, c. the slurry does not disperse under the scouring of high-temperature water with large volume and high flow rate. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless otherwise specified, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0030] 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 materials used to practice the present application, unless otherwise indicated, are commercially available from conventional sources. Unless otherwise indicated, the materials used to practice the present application are used according to conventional procedures or according to the manufacturer's instructions. Similarly, unless otherwise indicated, the methods used to practice the present application are carried out according to conventional procedures or according to the manufacturer's instructions. Also, any method and material similar or equivalent to those described herein can be used in the practice of the present application. The methods and materials described herein are illustrative only and not intended to be limiting.

[0031] As described in the background, in order to solve the problem that the common dynamic water anti-dispersion agent (such as acrylamide, tetramethyl ethylenediamine, xanthan gum, carboxymethyl cellulose, etc.) has a thermal reaction under high-temperature gushing water environment, resulting in the loss or weakening of the dynamic water anti-dispersion effect, and cannot be applied to the engineering problem of high-temperature fissure gushing water plugging working condition.

[0032] The present application provides a dynamic water anti-dispersion grouting material for high-temperature gushing water plugging, which is composed of the following raw materials in mass parts: 100 parts of Portland cement, 5.4-13 parts of anti-dispersion performance optimizing agent, 2.4-6 parts of expanding agent, 3.5-13 parts of accelerating activator, 0.15-0.91 parts of high-efficiency water reducing agent, and 35-45 parts of mixing water.

[0033] The anti-dispersion performance optimizing agent comprises A component and B component, and the mass ratio of the A component to the B component is (3.83-11.05):(0.67-1.95).

[0034] The A component is prepared by the following method: mixing lotus root starch, silane coupling agent modified bentonite and borax, ball milling to obtain a composite powder; then adding xanthan gum, sodium carboxymethyl starch and acrylic acid, and mixing uniformly to obtain the A component.

[0035] The B component is prepared by the following method: uniformly mixing tannic acid powder and yellow dextrin, then spraying an ethanol solution of ethyl cellulose, stirring to a preset particle size, and then obtaining coated tannic acid.

[0036] The activation agent is obtained by uniformly mixing ferric ammonium citrate, potassium persulfate and sodium bicarbonate.

[0037] The B component is obtained by uniformly mixing the activation agent and the coated tannic acid.

[0038] Further, the composite powder is composed of the following raw materials in parts by mass: lotus root powder 13.5-20 parts, silane coupling agent modified bentonite 4.2-7.9 parts, borax 0.26-2 parts, through the coupling effect of lotus root powder and modified bentonite, the lotus root paste fills the cement gel skeleton pores to form a flexible gel matrix to better block micro-cracks during hardening, and the bentonite provides a layered structure to adsorb starch molecules and can also react with portland cement to form a rigid lamellar skeleton.

[0039] Further, the preparation method of the coupling agent modified bentonite is as follows: 0.1-0.45 parts by mass of silane coupling agent is dissolved in ten times the volume of 75% ethanol solution. Then 5-11 parts by mass of calcium-based bentonite is added to the silane coupling agent ethanol solution. Acetic acid is added to adjust the pH value to 4.5±0.5, and then stirred at a stirring speed of 1000 rpm for 20 min. After centrifugation, the precipitate is dried and sieved through a 325 mesh screen to obtain the modified bentonite. The bentonite is modified by the silane coupling agent, and the hydrolysis of KH-570 forms silanol (≡Si-OH), which reacts with the interlayer Al-OH of the bentonite to form a stable Si-O-Al covalent bond, so that the organic phase and the inorganic phase are well combined, which is helpful for the development of later strength.

[0040] Further, the concentration of the acetic acid solution is 0.5 mol / L-1 mol / L to effectively adjust the pH value.

[0041] The type of silane coupling agent is not particularly limited in the present application, and the silane coupling agent is selected from one of KH550, KH560 and KH570; preferably, the silane coupling agent is KH570 to obtain a better modification effect.

[0042] Further, the calcium-based bentonite is sieved through a 200 mesh screen and dried in an oven at 101-105°C for 2-3 hours to remove the water in the calcium-based bentonite.

[0043] Further, the stirring temperature is 70-80°C to ensure the modification effect of the silane coupling agent on the bentonite.

[0044] Further, the A component is composed of the following raw materials in parts by mass: composite powder 18-29.41 parts, xanthan gum 18-29.41 parts, carboxymethyl starch sodium 0.5-3.05 parts, and acrylic acid 0.82-2.2 parts. The xanthan gum can instantaneously thicken, the xanthan gum has stability at high temperature and will not hydrolyze in the high-temperature water sealing condition, and the unique galactose side chain of the xanthan gum stretches and expands in the high-temperature flowing water to fuse with the layered structure of the bentonite, and the lotus root powder and the thickening agent interact with each other through hydrogen bonds to construct a viscous fluid skeleton in the flowing water.

[0045] Further, the coating tannic acid is composed of the following mass parts of raw materials: tannic acid powder 17.5-25 parts, yellow dextrin 2.15-3.2 parts, ethyl cellulose 2.9-5 parts. Ethyl cellulose forms a reticular film structure in an ethanol solvent, and after drying, a continuous and dense hydrophobic layer is formed on the surface of the tannic acid particles. This coating layer can effectively block the penetration of water molecules at low temperatures, so that the tannic acid remains inert during the pumping stage, avoiding the pre-reaction of calcium ions in the cement system, which leads to the failure of the accelerating component. Yellow dextrin, as a biobased pore former, is uniformly dispersed in the coating layer, and its degradation product, glucose, competes with dissolved oxygen in the gushing water, reducing the inhibitory effect of the oxidation environment on the activity of tannic acid.

[0046] Further, the ethanol solution of ethyl cellulose is prepared with anhydrous ethanol to ensure that the ethyl cellulose is fully dissolved.

[0047] Further, the spraying method is to spray at a speed of 200 mL / min-300 mL / min under an atomizing pressure of 1.2 bar-1.5 bar, and the stirring rate is 40 rpm-60 rpm, so that the ethyl cellulose fully coats the tannic acid.

[0048] Further, the preset particle size is 0.2 mm-0.4 mm, and the detection method is to take 2 mass parts of mixed samples every 3 min, and the spraying is stopped when about 80% of the samples pass through a 0.5 mm sieve, so that the coated tannic acid particles have a relatively optimal particle size range.

[0049] Further, the activator is composed of the following mass parts of raw materials: ferric ammonium citrate 7.2-11 parts, sodium bicarbonate 1.64-4 parts, potassium persulfate 0.77-1.4 parts. Ferric ammonium citrate releases Fe 3+ Forms a coordination network with tannic acid, and combines with tannic acid to form a powerful accelerator, reducing the setting time of cement.

[0050] Further, the B component is composed of the following mass parts of raw materials: activator 9.61-15.6 parts, coated tannic acid 20-28 parts. The hydrodynamic anti-dispersion component and the high-temperature activated component are packaged separately to avoid premature reaction, achieving excellent mixing and pumping performance at low temperatures.

[0051] It should be additionally pointed out that this high-temperature resistant hydrodynamic dispersion component is divided into A and B components for storage during production, packaging, and transportation, and is only mixed at the construction site for grouting and plugging high-temperature fissure gushing water.

[0052] Further, the expanding agent is composed of the following raw materials in mass parts: calcium oxide 2.4-4.2 parts, magnesium oxide 1.5-4.3 parts, sodium sulfate 0.04-0.09 parts. The expanding agent makes the cement-based material have certain expansibility, and realizes the effect of instant expansion and delayed expansion coordination, and well matches the hydration process, so as to realize the plugging of karst fissures under the condition of high-temperature gushing water.

[0053] Further, the accelerating activator is composed of the following raw materials in mass parts: sulphoaluminate cement 5.7-9.5 parts, nano-silica 2.5-5.2 parts, sodium silicate 0.4-0.81 parts, sodium gluconate 0.03-0.06 parts, which can dynamically control the setting time of the cement-based material, so as to adjust the pumpability and plugging timeliness of the grouting material according to different working conditions.

[0054] Further, the water reducing agent is a polycarboxylic acid water reducing agent, which can adjust the hydration speed of the cement-based material and improve the flow performance thereof, and is helpful to improve the pumping performance of the high-temperature fissure gushing water plugging material.

[0055] Further, the upstream hole is located at a position 1.2-1.5 m upstream of the gushing point and closest to the gushing source; the main grouting hole is the main gushing outlet; and the downstream hole is close to the construction operation side and located at a position about 0.6 m downstream of the gushing point.

[0056] Further, the water content of the high-mixing-amount plugging slurry is 50%-70% of that of the normal slurry, and the grouting pressure is 2 MPa higher than that of the normal slurry, so as to realize rapid setting and rapid plugging.

[0057] The application will be further described in detail below in combination with specific embodiments, and it should be pointed out that the specific embodiments are an explanation but not a limitation of the application.

[0058] In the following examples and comparative examples, the slurry anti-dispersion is tested by using the high-temperature cross-flow water column (80℃) glass plate dispersion test, and the water column flow rate is used to characterize the slurry anti-dispersion.

[0059] The initial / terminal setting time test method of the grouting material is as follows: the grouting material is placed in 80℃ hot water, and the initial setting and terminal setting time in water are measured in a constant temperature box.

[0060] According to the standard GB / T 50082-2009 "Standard for testing methods of long-term performance and durability of ordinary concrete", the shrinkage rate of the cement slurry stone body is tested, and the calculation formula is shrinkage rate (%) = [(L0-L n ) / L0]×100%, L0 is the reference length measured at 24h, and L n is the length measured after n days.

[0061] The strength of the stone body 28d of the grouting material refers to the uniaxial compressive strength measured after the material is cured for 28d.

[0062] Example 1

[0063] A high-temperature water gushing plugging dynamic water anti-dispersion grouting material, the raw material composition is as follows: 100 parts by mass of Portland cement, 8.3 parts by mass of anti-dispersion performance optimizing agent, 4.5 parts by mass of expanding agent, 7.2 parts by mass of accelerating activator, 0.64 parts by mass of high-efficiency water reducing agent, and 42 parts by mass of mixing water.

[0064] The preparation method of the high-temperature water gushing plugging dynamic water anti-dispersion grouting material of the embodiment comprises the following steps:

[0065] (1) 0.35 parts by mass of silane coupling agent KH-570 is dissolved in 3.5 parts by mass of 75% ethanol solution, then 7.5 parts by mass of calcium bentonite (bentonite is dried at 105°C and sieved through a 200-mesh screen) is added to the ethanol solution of the silane coupling agent, 0.5 mol / L acetic acid solution is added dropwise until the overall pH value of the solution is in the range of 4.5±0.5, then stirring is performed at a speed of 1000 rpm for 20 min. After centrifugation, the precipitate is dried and sieved through a 325-mesh screen to obtain modified bentonite.

[0066] (2) 17 parts by mass of lotus root starch (as shown in Figure 1 ), 7 parts by mass of modified bentonite, and 0.6 parts by mass of borax are mixed, and after 2h of grinding in a ball mill, a composite powder is obtained. The composite powder is put into a three-dimensional mixer and 4.5 parts by mass of xanthan gum, 2.1 parts by mass of sodium carboxymethyl starch, and 1.65 parts by mass of acrylic acid are added respectively. After stirring at a speed of 18 rpm for 45 min, a dry-mixed powder is obtained, which is denoted as component A.

[0067] (3) 22 parts by mass of tannic acid powder and 2.8 parts by mass of yellow dextrin are dry-mixed for 5 min using a mixer to obtain a mixture;

[0068] (4) 3.9 parts by mass of ethyl cellulose is dissolved in 20 parts by mass of anhydrous ethanol to obtain an ethyl cellulose ethanol solution; under a spraying pressure of 1.2 bar, the ethyl cellulose ethanol solution is sprayed at a speed of 200 mL / min onto the mixture, and stirring is continued until the particle size of the particles is 0.3±0.1 mm, then the stirring is stopped, and after the ethanol is volatilized, coated tannic acid is obtained.

[0069] (4) 8 parts by mass of ferric ammonium citrate, 0.95 parts by mass of potassium persulfate, and 2.4 parts by mass of sodium bicarbonate are mixed uniformly to obtain an activator component, and 25 parts by mass of the coated tannic acid particles obtained above are mixed to obtain a high-temperature activation component, which is denoted as component B.

[0070] (5) The anti-dispersion performance optimizing agent is prepared by sealing and packaging the A component and the B component respectively.

[0071] (6) 3.5 parts by mass of calcium oxide, 3.0 parts by mass of magnesium oxide, and 0.06 parts by mass of sodium sulfate are mixed uniformly to prepare an expanding agent.

[0072] (7) 7.2 parts by mass of sulfoaluminate cement, 4.6 parts by mass of nano-silica, 0.62 parts by mass of sodium silicate, and 0.04 parts by mass of sodium gluconate are uniformly mixed to prepare a coagulation accelerator.

[0073] (8) 0.65 parts by mass of polycarboxylic acid water reducing agent is used as the water reducing agent of the cement matrix.

[0074] (9) After the A component and the B component are opened and uniformly mixed, they are sealed and stored in a No. 1 cylinder of a double-cylinder grouting pump for standby.

[0075] (10) 100 parts by mass of Portland cement, 4.5 parts by mass of the expanding agent, 8.3 parts by mass of the anti-dispersion performance optimizing agent (7.06 parts by mass of the A component and 1.24 parts by mass of the B component), 7.2 parts by mass of the coagulation accelerator, and 0.64 parts by mass of the high-efficiency water reducing agent are uniformly mixed and then placed in a No. 2 cylinder of the double-cylinder grouting pump, and dry mixing is performed at a speed of 200 r / min for 2 min.

[0076] (11) After 42 parts by mass of normal-temperature mixed water is injected into the No. 2 cylinder, the grouting pump is started to mix the dry materials with the mixed water, and the mixture in the No. 1 cylinder described in step (9) is sprayed at a pressure of 0.8 MPa, and then uniformly stirred to form a mixed slurry.

[0077] (12) The slurry is injected into a high-temperature water gushing crack through a pre-buried grouting pipe at a grouting pressure greater than the water gushing pressure, and three-hole synchronous grouting can be selected according to the water gushing condition: a high-dosage sealing slurry (containing 60% of the water content of the normal slurry) is injected into an upstream hole near the upstream of the water gushing point at about 1.2 m; the slurry described in the present embodiment is injected into a main grouting hole; the slurry described in the present embodiment to which 0.2% of basalt fiber is added is injected into a downstream hole near the construction operation side and located at about 0.6 m downstream of the water gushing point, and the grouting flow rate is controlled at 40 L / min.

[0078] The anti-dispersion performance of the grouting material prepared in the present embodiment under high-temperature dynamic water, the initial and final setting times of the slurry, the shrinkage rate of the set stone, and the strength of the set stone are tested, and the test results are shown in Table 1.

[0079] Experimental results show that: (1) Adding a certain amount of high-temperature dynamic water anti-dispersion performance optimizer enables cement-based materials to resist the scouring of high-temperature dynamic water (80℃) with a flow rate of 0m / s-1.5m / s. (2) The aggregate under this ratio undergoes micro-expansion. (3) Adding a certain amount of anti-dispersion performance optimizer has no effect on the 28-day strength of the aggregate, and the strength is basically consistent with the strength of cement aggregate with this water-cement ratio.

[0080] like Figure 2 As shown in Figure a, the anti-dispersion property of the grouting material was tested by injecting it into still water at 80°C. Figure 2 As shown in Figure b, the slurry does not disperse within 120 seconds at high temperature.

[0081] like Figure 3 As shown in Figures a and b, 80℃ hot water was poured onto the grouting material from a height of 50cm at a speed of 6L / s. Its anti-dispersion properties under the scouring of 80℃ hot water were observed. Figure 3 As shown in Figure c, the slurry does not disperse within 180 seconds under the flushing of large volume, high flow rate, and high temperature dynamic water.

[0082] Example 2

[0083] A high-temperature water inrush sealing and anti-dispersion grouting material has the following raw material composition: 100 parts by weight of silicate cement, 5.4 parts by weight of anti-dispersion performance optimizer, 2.4 parts by weight of expansion agent, 3.5 parts by weight of setting activator, 0.75 parts by weight of high-efficiency water-reducing agent, and 35 parts by weight of mixing water.

[0084] The preparation method is the same as in Example 1, except that:

[0085] In step (1), 0.14 parts by mass of silane coupling agent KH-570, 1.4 parts by mass of 75% ethanol solution, and 5.6 parts by mass of calcium-based bentonite are used.

[0086] In step (2), there are 13.5 parts by weight of lotus root powder, 5.3 parts by weight of modified bentonite, 0.26 parts by weight of borax, 6.5 parts by weight of xanthan gum, 0.60 parts by weight of sodium carboxymethyl starch, and 0.82 parts by weight of acrylic acid.

[0087] In step (3), 17.5 parts by weight of tannic acid powder and 2.15 parts by weight of dextrin are used.

[0088] In step (4), 2.9 parts by weight of ethyl cellulose, 25 parts by weight of anhydrous ethanol solution, 7.2 parts by weight of ferric ammonium citrate, 0.77 parts by weight of potassium persulfate, 1.64 parts by weight of sodium bicarbonate, and 20 parts by weight of coated tannic acid granules.

[0089] In step (6), there are 2.4 parts by mass of calcium oxide, 4.3 parts by mass of magnesium oxide, and 0.04 parts by mass of sodium sulfate.

[0090] In step (7), 5.7 parts by mass of sulphoaluminate cement, 3.5 parts by mass of nano-silica, 0.44 parts by mass of sodium silicate, and 0.05 parts by mass of sodium gluconate.

[0091] In step (10), 100 parts by mass of Portland cement, 5.4 parts by mass of anti-dispersion performance optimizing agent (4.59 parts by mass of component A and 0.81 parts by mass of component B), 2.4 parts by mass of expansive agent, 3.5 parts by mass of coagulation accelerator, and 0.75 parts by mass of superplasticizer are mixed.

[0092] In step (11), 35 parts by mass of mixing water is mixed.

[0093] The experimental results show that: (1) the addition of a certain amount of high-temperature dynamic water anti-dispersion performance optimizing agent enables the cement-based material to resist high-temperature dynamic water (80°C) flushing at a flow rate of 0 m / s to 1.5 m / s; (2) the stone body of the ratio expands slightly; and (3) the addition of a certain amount of anti-dispersion performance optimizing agent has no effect on the 28d strength of the stone body, and the strength is basically the same as that of the cement stone body of the water-cement ratio.

[0094] Example 3

[0095] A high-temperature gushing water plugging dynamic water anti-dispersion grouting material, the raw material composition is as follows: Portland cement 100 parts by mass, anti-dispersion performance optimizing agent 13 parts by mass, expansive agent 5.5 parts by mass, coagulation accelerator 13 parts by mass, superplasticizer 0.91 parts by mass, and mixing water 45 parts by mass.

[0096] The preparation method is the same as that of example 1, except that:

[0097] In step (1), 0.41 parts by mass of silane coupling agent KH-570, 4.1 parts by mass of 75% ethanol solution, and 8.4 parts by mass of calcium bentonite are mixed.

[0098] In step (2), 20 parts by mass of lotus root powder, 7.9 parts by mass of modified bentonite, 1.51 parts by mass of borax, 8.9 parts by mass of xanthan gum, 3.05 parts by mass of carboxymethyl starch sodium, and 2.2 parts by mass of acrylic acid are mixed.

[0099] In step (3), 25 parts by mass of tannic acid powder and 3.2 parts by mass of yellow dextrin are mixed.

[0100] In step (4), 4.3 parts by mass of ethyl cellulose, 20 parts by mass of anhydrous ethanol solution, 11 parts by mass of ferric ammonium citrate, 1.4 parts by mass of potassium persulfate, 3.2 parts by mass of sodium bicarbonate, and 28 parts by mass of coated tannic acid particles are mixed.

[0101] In step (6), 4.2 parts by mass of calcium oxide, 1.5 parts by mass of magnesium oxide, and 0.09 parts by mass of sodium sulfate are mixed.

[0102] In step (7), 9.5 parts by mass of sulphoaluminate cement, 5.2 parts by mass of nano-silica, 0.81 parts by mass of sodium silicate, and 0.06 parts by mass of sodium gluconate.

[0103] In step (10), 100 parts by mass of Portland cement, 5.5 parts by mass of an expansive agent component, 13 parts by mass of a dynamic water anti-dispersion performance optimizing agent component (11.05 parts by mass of component A and 1.95 parts by mass of component B), 8.5 parts by mass of a coagulation accelerator component, and 0.91 parts by mass of a superplasticizer component are mixed.

[0104] In step (11), 45 parts by mass of water is mixed at room temperature.

[0105] The experimental results show that: (1) the cement-based material can resist high-temperature dynamic water (80℃) scouring at a flow rate of 0m / s-1.5m / s by adding a certain amount of high-temperature dynamic water anti-dispersion performance optimizing agent; (2) the stone body of the ratio expands slightly; and (3) adding a certain amount of anti-dispersion performance optimizing agent has no effect on the 28d strength of the stone body, and the strength is basically the same as that of the cement stone body of the same water-cement ratio.

[0106] Example 4

[0107] A high-temperature gushing water plugging dynamic water anti-dispersion grouting material, the raw material composition is as follows: Portland cement 100 parts by mass, anti-dispersion performance optimizing agent 13 parts by mass, expansive agent 5.5 parts by mass, coagulation accelerator 13 parts by mass, superplasticizer 0.91 parts by mass, and mixing water 45 parts by mass.

[0108] The preparation method is the same as that of example 1, except that:

[0109] In step (1), 0.33 parts by mass of silane coupling agent KH-570, 3.3 parts by mass of 75% ethanol solution, and 10.6 parts by mass of calcium bentonite are mixed.

[0110] In step (2), 18 parts by mass of lotus root powder, 4.5 parts by mass of modified bentonite, 2 parts by mass of borax, 6.4 parts by mass of xanthan gum, 3 parts by mass of carboxymethyl starch sodium, and 0.95 parts by mass of acrylic acid are mixed.

[0111] In step (3), 18 parts by mass of tannic acid powder and 2.8 parts by mass of yellow dextrin are mixed.

[0112] In step (4), 5 parts by mass of ethyl cellulose, 25 parts by mass of anhydrous ethanol solution, 8.6 parts by mass of ferric ammonium citrate, 1.4 parts by mass of potassium persulfate, 4 parts by mass of sodium bicarbonate, and 22 parts by mass of coated tannic acid particles are mixed.

[0113] In step (6), 2.5 parts by mass of calcium oxide, 2.5 parts by mass of magnesium oxide, and 0.05 parts by mass of sodium sulfate are mixed.

[0114] In step (7), 5.8 parts by mass of sulphoaluminate cement, 2.5 parts by mass of nano-silica, 0.4 parts by mass of sodium silicate, and 0.04 parts by mass of sodium gluconate.

[0115] In step (10), 100 parts by mass of Portland cement, 3.5 parts by mass of an expansive agent component, 4.5 parts by mass of a dynamic water anti-dispersion performance optimizing agent component (3.83 parts by mass of component A and 0.67 parts by mass of component B), 9 parts by mass of a coagulation accelerator component, and 0.55 parts by mass of a superplasticizer component.

[0116] In step (11), 45 parts by mass of water for mixing at room temperature.

[0117] The experimental results show that: (1) the addition of a certain amount of high-temperature dynamic water anti-dispersion performance optimizing agent enables the cement-based material to resist high-temperature dynamic water (80°C) scouring at a flow rate of 0 m / s to 1.5 m / s; (2) the stone body prepared in this ratio is slightly expanded; and (3) the addition of a certain amount of anti-dispersion performance optimizing agent has no effect on the 28d strength of the stone body, and the strength is basically the same as that of a cement stone body with this water-cement ratio.

[0118] Example 5

[0119] A dynamic water anti-dispersion grouting material for high-temperature gushing water plugging, the raw material composition is as follows: Portland cement 100 parts by mass, anti-dispersion performance optimizing agent 10 parts by mass, expansive agent 6 parts by mass, coagulation accelerator 6.3 parts by mass, superplasticizer 0.15 parts by mass, and mixing water 40 parts by mass.

[0120] The preparation method is the same as that in Example 1, except that:

[0121] In step (1), 0.32 parts by mass of silane coupling agent KH-570, 3.2 parts by mass of 75% ethanol solution, and 4 parts by mass of calcium bentonite are used.

[0122] In step (2), 13.5 parts by mass of lotus root powder, 4.2 parts by mass of modified bentonite, 0.3 parts by mass of borax, 11 parts by mass of xanthan gum, 0.5 parts by mass of sodium carboxymethyl starch, and 1.85 parts by mass of acrylic acid are used.

[0123] In step (3), 21 parts by mass of tannic acid powder and 2.2 parts by mass of yellow dextrin are used.

[0124] In step (4), 5 parts by mass of ethyl cellulose, 25 parts by mass of anhydrous ethanol solution, 9 parts by mass of ferric ammonium citrate, 1 part by mass of potassium persulfate, 2.5 parts by mass of sodium bicarbonate, and 28 parts by mass of coated tannic acid particles are used.

[0125] In step (6), 3 parts by mass of calcium oxide, 3 parts by mass of magnesium oxide, 0.05 parts by mass of sodium sulfate,

[0126] In step (7), 6.5 parts by mass of sulphoaluminate cement, 2.4 parts by mass of nano-silica, 0.7 parts by mass of sodium silicate, and 0.03 parts by mass of sodium gluconate are used.

[0127] In step (10), 100 parts by mass of Portland cement, 6 parts by mass of an expansive agent, 10 parts by mass of an anti-dispersion performance optimizing agent (8.5 parts by mass of component A and 1.5 parts by mass of component B), 6.3 parts by mass of a coagulation accelerator, and 0.15 parts by mass of a superplasticizer are used.

[0128] In step (11), 40 parts by mass of normal-temperature mixing water are used.

[0129] The experimental results show that (1) the addition of a certain amount of high-temperature flowing water anti-dispersion performance optimizing agent enables the cement-based material to resist the scouring of high-temperature flowing water (80°C) at a flow rate of 0 m / s to 1.5 m / s. (2) The stone body under this proportioning has a slight expansion. (3) The addition of a certain amount of anti-dispersion performance optimizing agent has no effect on the strength of the stone body, and the strength is basically the same as that of the cement stone body with this water-cement ratio.

[0130] Table 1 Performance test results of grouting materials

[0131]

[0132] Comparative Example 1

[0133] The difference from Example 1 is that in step (2), no lotus root powder is added.

[0134] The experimental results show that (1) the addition of no lotus root powder will greatly impair the anti-dispersion performance of the slurry, resulting in poor grouting and slurry retention effects. (2) The stone body under this proportioning has a relatively obvious expansion. (3) The addition of lotus root powder has no obvious effect on the strength of the stone body, and may even slightly increase the strength.

[0135] Comparative Example 2

[0136] The difference from Example 1 is that in step (2), no modified bentonite is added.

[0137] The experimental results show that (1) the addition of no modified bentonite will reduce the anti-dispersion performance of the slurry. (2) The stone body under this proportioning has a slight expansion. (3) The addition of no modified bentonite will cause a certain degree of decrease in the strength of the material stone body.

[0138] Comparative Example 3

[0139] The difference from Example 1 is that in step (2), bentonite is used instead of modified bentonite.

[0140] The experimental results show that: (1) the addition of calcium bentonite without modification by silane coupling agent will reduce the anti-dispersion of the slurry. (2) The stone body under this ratio has micro-expansion. (3) The calcium bentonite without modification by silane coupling agent has little effect on the 28d strength of the stone body, which is similar to the stone body strength of Example 1.

[0141] Comparative Example 4

[0142] The difference from Example 1 is that tannic acid is used instead of coated tannic acid.

[0143] The experimental results show that: due to the lack of ethyl cellulose coating protection, tannic acid will pre-react with calcium ions in the cement system during the low-temperature pumping stage, resulting in the early consumption of high-temperature activation components. When the slurry contacts high-temperature flowing water, it cannot form an effective Fe 3+ -tannic acid coordination network, and the anti-dispersion performance is significantly reduced to 68%. In addition, tannic acid without coating protection is easily inhibited by the oxidation environment, further weakening the anti-dispersion under high-temperature flowing water conditions.

[0144] The strength of the stone body of the coated tannic acid system is 13.9 MPa, which is significantly lower than 15.8 MPa of Example 1. This is because tannic acid reacts with calcium ions in advance, cannot form an effective coordination network with Fe 3+ at high temperatures, resulting in insufficient and uneven hydration reaction. At the same time, tannic acid without coating protection is easily oxidized, further weakening its coagulation effect, affecting the compactness and strength development of the stone body.

[0145] Comparative Example 5

[0146] The difference from Example 1 is that no yellow dextrin is added.

[0147] The experimental results show that: (1) due to the lack of yellow dextrin, tannic acid cannot be effectively protected by oxidation, and the degree of oxidation of tannic acid increases under high-temperature flowing water environment, resulting in a weakened coordination network with Fe 3+ , and the anti-dispersion performance is reduced to 74%. Although the ethyl cellulose coating still provides some protection, the lack of antioxidant mechanism of yellow dextrin causes the material to perform significantly worse in high-temperature flowing water environment.

[0148] (2) The stone body under this ratio has micro-shrinkage.

[0149] (3) The strength of the stone body without yellow dextrin is 14.6 MPa, which is lower than 15.8 MPa of Example 1. This is because tannic acid is oxidized and cannot fully react with Fe 3+The stable coordination network formed leads to insufficient hydration reaction and reduced structure compactness. Although other components can still play a role, the reduction of tannin activity affects the overall hydration process and the stone mass quality.

[0150] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dynamic water anti-dispersion grouting material for sealing high-temperature water inrush, characterized in that, It is composed of the following raw materials in parts by weight: 100 parts by weight of silicate cement, 5.4-13 parts by weight of anti-dispersion performance optimizer, 2.4-6 parts by weight of expansion agent, 3.5-13 parts by weight of setting activator, 0.15-0.91 parts by weight of high-efficiency water-reducing agent, and 35-45 parts by weight of mixing water; The anti-dispersion performance optimizer comprises: component A and component B, wherein the mass ratio of component A to component B is (3.83-11.05):(0.67-1.95). Component A was prepared by the following method: lotus root powder, silane coupling agent modified bentonite and borax were mixed and ball-milled to obtain a composite powder; then xanthan gum, sodium carboxymethyl starch and acrylic acid were added and mixed evenly to obtain component A. Component B is prepared by the following method: Tannic acid powder is mixed evenly with xanthodextrin, then an ethanol solution of ethyl cellulose is sprayed on, and the mixture is stirred to the preset particle size to obtain coated tannic acid. After mixing ferric ammonium citrate, potassium persulfate, and sodium bicarbonate evenly, an activator is obtained. The activator is mixed evenly with the coated tannic acid to obtain component B.

2. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, The composite powder is composed of the following raw materials in parts by weight: 13.5-20 parts lotus root powder, 4.2-7.9 parts silane coupling agent modified bentonite, and 0.26-2 parts borax.

3. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, Component A is composed of the following raw materials in parts by weight: 18-29.41 parts of composite powder, 18-29.41 parts of xanthan gum, 0.5-3.05 parts of sodium carboxymethyl starch, and 0.82-2.2 parts of acrylic acid.

4. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, The coated tannic acid is composed of the following raw materials in parts by weight: 17.5-25 parts tannic acid powder, 2.15-3.2 parts xanthodextrin, and 2.9-5 parts ethyl cellulose.

5. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, The activator is composed of the following raw materials in parts by weight: 7.2-11 parts ferric ammonium citrate, 1.64-4 parts sodium bicarbonate, and 0.77-1.4 parts potassium persulfate.

6. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, Component B is composed of the following raw materials in parts by weight: 9.61-15.6 parts of activator and 20-28 parts of coated tannic acid.

7. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, The expanding agent is composed of the following raw materials in parts by weight: 2.4-4.2 parts calcium oxide, 1.5-4.3 parts magnesium oxide, and 0.04-0.09 parts sodium sulfate.

8. The high-temperature water inrush sealing and anti-dispersion grouting material as described in claim 1, characterized in that, The coagulation activator is composed of the following raw materials in parts by weight: 5.7-9.5 parts of sulfoaluminate cement, 2.5-5.2 parts of nano silica fume, 0.4-0.81 parts of sodium silicate, and 0.03-0.06 parts of sodium gluconate.

9. A method for preparing a dynamic water anti-dispersion grouting material for high-temperature water inrush sealing according to any one of claims 1-8, characterized in that, include: Mix component A and component B evenly to obtain an anti-dispersion performance optimizer; Cement, expansion agent, setting accelerator and water-reducing agent are dry-mixed, water is added and mixed evenly to obtain a mixed slurry; The mixture is prepared by mixing the slurry with the anti-dispersion performance optimizer until homogeneous.

10. The preparation method of the dynamic water anti-dispersion grouting material for high-temperature water inrush sealing as described in claim 9, characterized in that, The dry mixing conditions are 200r / min-300r / min for 2min-5min.

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