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CN-122010506-A - Stratum reinforcing material for fault fracture zone, preparation method of stratum reinforcing material and grouting device

CN122010506ACN 122010506 ACN122010506 ACN 122010506ACN-122010506-A

Abstract

The application discloses a stratum reinforcing material for a fault fracture zone, a preparation method thereof and a grouting device, and belongs to the field of reinforcing materials, wherein the stratum reinforcing material for the fault fracture zone comprises superfine sulphoaluminate cement, wherein the D50 particle size A of the superfine sulphoaluminate cement is 1.0-1.5 mu m, the D50 particle size B of the superfine silicate cement is 2.5-3.5 mu m, superfine coal ash, the D50 particle size C of the superfine coal ash is 4-6 mu m and the like. According to the application, the superfine sulphoaluminate cement, the superfine silicate cement, the superfine fly ash and the red mud which meet the grain size limiting relation are adopted for matching, the filling capacity of the material to the fine cracks of the stratum of the fault fracture zone is enhanced through the multistage filling effect, and the compression strength, the impermeability, the early strength, the condensation time matching and the like of the material are improved, so that the core requirement of rapid reinforcement of the stratum of the fault fracture zone is met.

Inventors

  • LI ZHIJUN
  • LI GUO
  • LIU WEI
  • DOU ZHIHAO
  • LUO SHAOHUA
  • SU HAIBO
  • ZHOU YANG
  • LUO GANG
  • LI GEN
  • BAI LIANG
  • YOU JINHU
  • ZHANG RUILIN
  • Cao Shengmao
  • WANG JIONGCHAO
  • ZHAO HAILEI

Assignees

  • 中铁隧道局集团有限公司
  • 中国雅江集团有限公司

Dates

Publication Date
20260512
Application Date
20251226

Claims (10)

  1. 1. A fracture zone formation strengthening material, comprising: the D50 particle size A of the superfine sulphoaluminate cement is 1.0-1.5 mu m; the D50 particle size B of the superfine silicate cement is 2.5-3.5 mu m; The superfine fly ash has a D50 particle size C of 4-6 mu m; The D50 particle size D of the red mud is 6-8 mu m; The D50 particle size A of the superfine sulphoaluminate cement, the D50 particle size B of the superfine silicate cement and the D50 particle size C of the superfine fly ash meet the following relation that the C/A is less than or equal to 4.0 and the B/A is less than or equal to 6.5.
  2. 2. The fractured zone formation reinforcement material of claim 1, wherein, the stratum reinforcing material for the fault fracture zone comprises the following raw materials in percentage by mass: 40-50% of superfine sulphoaluminate cement, 10-15% of superfine silicate cement, 20-25% of superfine coal ash, 8-12% of red mud, 1-2% of early strength agent, 1-1.5% of water reducer, 0.1-0.2% of thickener and 0.8-1.2% of accelerator.
  3. 3. The fault fracture zone stratum reinforcing material according to claim 2, wherein the early strength agent is composed of calcium formate and aluminum sulfate in a mass ratio of (2-3): 1.
  4. 4. The fault zone formation strengthening material according to claim 2, wherein the thickener is composed of guar gum and xanthan gum in a mass ratio of (1-2).
  5. 5. The fractured zone formation reinforcement material of claim 2, wherein the water reducer comprises a polycarboxylate water reducer; And/or the accelerator comprises at least one of alkali-free liquid fluorosilicate accelerator, aluminum oxide clinker-red mud composite powder accelerator and polycarboxylic acid-aluminum sulfate composite accelerator.
  6. 6. A method for preparing the fracture zone stratum reinforcing material according to any one of claims 1 to 5, which is characterized by comprising the following steps: Mixing superfine sulphoaluminate cement, superfine silicate cement, superfine fly ash and red mud to obtain a dry mixed material; and adding the rest raw materials and water into the dry blend for mixing to obtain the stratum reinforcing material of the fault fracture zone.
  7. 7. The method for preparing the stratum reinforcing material of the fault fracture zone according to claim 6, wherein the preparation of the early strength agent comprises the following steps of weighing calcium formate and aluminum sulfate according to mass proportion, respectively performing ball milling, and mixing when the fineness reaches D50 less than or equal to 10 mu m, so as to obtain the early strength agent.
  8. 8. The method for preparing the stratum reinforcing material of the fault fracture zone according to claim 6, wherein the preparation of the water reducing agent comprises the following steps: polyethylene glycol monomethyl ether and acrylic acid are subjected to esterification reaction for 6-8 hours at 85-95 ℃ in the presence of a catalyst according to the molar ratio of 1 (1.0-1.2), so as to obtain a macromolecular monomer; and (3) dissolving the macromer, acrylic acid and sodium methacrylate in the mass ratio of (35-45) to (3-5) 1 in water, dropwise adding an initiator accounting for 0.8-1.5% of the total mass of the monomers under the protection of inert gas at 60-70 ℃ for 3-4 hours, cooling after the reaction is finished, and neutralizing with alkali liquor until the pH value is=6.5-7.0 to obtain the water reducer.
  9. 9. The method for preparing the fault zone formation strengthening material according to claim 6, wherein the preparation of the thickener comprises the following steps: weighing guar gum and xanthan gum according to mass ratio, respectively drying and crushing, sieving with a 160-190 mesh sieve to obtain powder, and mixing to obtain mixed powder; and adding citric acid accounting for 0.3-0.6wt% of the total mass of the mixed powder into the mixed powder for mixing to obtain the thickener.
  10. 10. A grouting device, characterized by being used for realizing grouting operation of the fault broken belt stratum reinforcing material according to any one of claims 1-5 or the fault broken belt stratum reinforcing material prepared by adopting the preparation method of the fault broken belt stratum reinforcing material according to any one of claims 6-9; the grouting device comprises: A support member, and The slurry container is arranged above the supporting component and is conveyed to the guniting head component through the stirring container, the conveying pipe and the pumping component; the slurry container is provided with a flow sensor, the stirring container is provided with a motor and a stirrer, and the pumping component is connected with a controller.

Description

Stratum reinforcing material for fault fracture zone, preparation method of stratum reinforcing material and grouting device Technical Field The application belongs to the field of reinforcing materials, and particularly relates to a stratum reinforcing material for a fault fracture zone, a preparation method thereof and a grouting device. Background The fault fracture zone is a broken rock body area formed in the fracture zone and the vicinity thereof after the rock bodies at two sides of the fracture surface are relatively displaced due to the strong stress action of the rock stratum in the crust movement process. The regional rock mass has high breaking degree, extremely developed cracks, loose internal structure and poor stability, so that the regional rock mass is extremely easy to cause a series of serious disasters such as water burst mud burst, surrounding rock instability and the like, and the regional rock mass has a great threat to construction safety and operation stability in the fields of underground engineering, mining and the like. When dealing with disaster problems caused by fault fracture zones, grouting technology is a core means for managing such disasters. By injecting specific grouting materials into the fault fracture zone, cracks and pores in the rock mass are filled, and the integrity and stability of the rock mass are enhanced, so that the purpose of disaster prevention and control is achieved. In the existing grouting technology, the grouting material mostly adopts cement-based, organic-inorganic composite and other systems. For example, the cement-based grouting material is modified by utilizing industrial waste residues such as fly ash, slag and the like, so that the performance of the grouting material is improved, the material cost is reduced, the recycling of the industrial waste residues is realized, or the sealing performance of the grouting material is improved by adding organic materials such as polyurethane and the like, so that the grouting material is better suitable for complex geological conditions. However, there are still some problems to be solved in the existing grouting materials. On one hand, the permeability of the material to fine cracks is limited, the fine gaps in a fault fracture zone are difficult to fully fill, the grouting reinforcement effect is affected, on the other hand, some materials are poor in the matching performance of early strength and setting time, or the early strength develops too fast, so that the operability in the grouting process is reduced, or the setting time is too long, an effective supporting structure cannot be formed in time, and hidden danger is brought to engineering safety. Disclosure of Invention The present application aims to solve at least one of the technical problems in the related art to some extent. Therefore, the application aims to provide a stratum reinforcing material for a fault fracture zone, a preparation method thereof and a grouting device. According to the application, the superfine sulphoaluminate cement, the superfine silicate cement, the superfine fly ash and the red mud which meet the grain size limiting relation are adopted for matching, the filling capacity of the material to the fine cracks of the stratum of the fault fracture zone is enhanced through the multistage filling effect, and the compression strength, the impermeability, the early strength, the condensation time matching and the like of the material are improved, so that the core requirement of rapid reinforcement of the stratum of the fault fracture zone is met. The first aspect of the application provides a stratum reinforcing material for a fault fracture zone. According to an embodiment of the present application, the fracture zone formation strengthening material comprises: the D50 particle size A of the superfine sulphoaluminate cement is 1.0-1.5 mu m; the D50 particle size B of the superfine silicate cement is 2.5-3.5 mu m; The superfine fly ash has a D50 particle size C of 4-6 mu m; The D50 particle size D of the red mud is 6-8 mu m; The D50 particle size A of the superfine sulphoaluminate cement, the D50 particle size B of the superfine silicate cement and the D50 particle size C of the superfine fly ash meet the following relation that the C/A is less than or equal to 4.0 and the B/A is less than or equal to 6.5. According to the stratum reinforcing material for the fault fracture zone, disclosed by the embodiment of the application, the superfine sulphoaluminate cement, the superfine silicate cement, the superfine fly ash and the red mud which meet the grain size limiting relation are adopted for matching use, the filling capacity of the material for fine cracks of the stratum of the fault fracture zone is enhanced through a multistage filling effect, the compression strength, the permeability resistance, the early strength, the coagulation time matching property and the like of the material are improved, and therefore the core