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CN-122010477-A - Self-driven penetration-enhanced grouting material and preparation method thereof

CN122010477ACN 122010477 ACN122010477 ACN 122010477ACN-122010477-A

Abstract

The application provides a self-driven penetration-enhanced grouting material and a preparation method thereof, wherein the self-driven penetration-enhanced grouting material comprises, by mass, 100-120 parts of a self-driven cementing material, 5-8 parts of a driving molecule, 1 part of a catalytic accelerator, 1-2 parts of a toughening agent and 1-3 parts of a reinforcing agent, the self-driven cementing material comprises Portland cement, polycarboxylic acid molecules containing phosphate groups and catalytic nanoparticles, the mass ratio of the polycarboxylic acid molecules to the catalytic nanoparticles is 1:3-5, and the polycarboxylic acid molecules account for 1.6-2% of the mass of the Portland cement. The grouting material provided by the application is a self-driven penetration enhancement grouting material, is suitable for loose fine powder coal roadways of coal mines, and solves the problem of 'no injection' of loose broken powder surrounding rock reinforcement of the coal mines.

Inventors

  • LI JIAFENG
  • WU PENGFEI
  • LIANG JIAMING
  • ZHENG YANGFA
  • WU YONGZHENG
  • YANG JIANWEI
  • SUN XIAODONG
  • YIN XIWEN
  • JIANG PENGFEI
  • GAO FUQIANG
  • ZHANG ZHEN
  • LI WENZHOU

Assignees

  • 中煤科工开采研究院有限公司

Dates

Publication Date
20260512
Application Date
20251222

Claims (10)

  1. 1. The self-driven permeation enhancement grouting material is characterized by comprising, by mass, 100-120 parts of self-driven cementing material, 5-8 parts of driving molecules, 1 part of catalytic promoter, 1-2 parts of flexibilizer and 1-3 parts of reinforcing agent, wherein the self-driven cementing material comprises Portland cement, polycarboxylic acid molecules containing phosphate groups and catalytic nanoparticles, the mass ratio of the polycarboxylic acid molecules to the catalytic nanoparticles is 1:3-5, and the polycarboxylic acid molecules account for 1.6-2% of the mass of the Portland cement.
  2. 2. Grouting material as claimed in claim 1, characterized in that the driving molecules comprise a mass ratio of 1:3:1 of carboxamide, ammonium bicarbonate and ammonium carbamate.
  3. 3. The grouting material of claim 1, wherein the catalytic nanoparticles comprise ferric oxide nanoparticles and manganese dioxide nanoparticles in a mass ratio of 1:2.
  4. 4. The grouting material of claim 1, wherein the catalyst promoter comprises cobalt hydroxide and cobalt chloride in a mass ratio of 1:1.
  5. 5. The grouting material of claim 1, wherein the toughening agent comprises bis (cyclopentadienyl) nickel and nickel acetylacetonate in a mass ratio of 4:1.
  6. 6. The grouting material of claim 1, wherein the reinforcing agent comprises nickel oxide and cobalt oxide in a mass ratio of 1:1.
  7. 7. The preparation method of the self-driven penetration-enhanced grouting material is characterized by comprising the following steps of: uniformly mixing polycarboxylic acid molecules and catalytic nano particles according to stoichiometric amount to obtain uniform powder; Uniformly adsorbing the uniform powder on particles of the silicate cement according to stoichiometric amount to obtain the self-driven cementing material; The grouting material of any one of claims 1-6 is obtained by uniformly mixing the self-driven cementing material, the driving molecules, the catalytic promoter, the toughening agent and the reinforcing agent according to stoichiometric amount.
  8. 8. The method of claim 7, wherein the polycarboxylic acid molecules and the catalytic nanoparticles are stirred in a dry powder mixer at 20 ℃ for 30-40min.
  9. 9. The method according to claim 7, wherein the self-driven cementitious material is prepared by mechanochemical action and vapor transport-adsorption of fine particles by high-velocity air impact in a fluidized-bed jet mill.
  10. 10. The method of claim 7, wherein the self-driven cementitious material, the driving molecules, the catalyst promoter, the toughening agent and the reinforcing agent are stirred in a dry powder mixer at 20 ℃ for 15-20min; And/or adding water and stirring when the grouting material is used, so as to obtain grouting slurry, wherein the water-cement ratio of the grouting slurry is 0.6-0.8.

Description

Self-driven penetration-enhanced grouting material and preparation method thereof Technical Field The application relates to the technical field of grouting materials, in particular to a self-driven penetration-enhanced grouting material and a preparation method thereof. Background As a part of the support-modification-pressure relief coal mine roadway surrounding rock complete control technology, the grouting modification technology can effectively control roadway deformation by forming a reinforcing layer, and is an effective way for reinforcing the roadway surrounding rock. However, in loose and fine-powder broken coal rock, the conventional grouting material is difficult to effectively inject due to extremely loose rock structure, fine particles and extremely undeveloped primary cracks, and the conventional grouting material is limited in flow permeability and cannot fully enter micro-pores and particle gaps in the rock, so that the actual slurry feeding amount is seriously insufficient, and the slurry diffusion range is narrow. Grouting reinforcement effect is obviously limited in the related art, a continuous and complete reinforcement framework is difficult to form, the integrity and stability of roadway surrounding rock cannot be effectively improved, and the reliability and durability of supporting engineering are seriously affected. The grouting reinforcement of the loose fine powder crushed coal rock mass has the advantages of small slurry feeding amount, serious slurry leakage and limited reinforcement effect, seriously influences the grouting effect, and is the most main constraint factor for grouting reinforcement of the surrounding rock of the loose fine powder crushed coal rock mass. Therefore, development of a self-driven penetration-enhanced grouting material suitable for loose fine powder coal roadways of coal mines is needed, and the problem of 'no injection' of loose broken powder surrounding rock reinforcement of the coal mines is solved. Disclosure of Invention The present application aims to solve at least one of the technical problems in the related art to some extent. The application provides a self-driven penetration-enhanced grouting material and a preparation method thereof, wherein the preparation method is simple, low in cost and suitable for loose broken coal roadways of coal mines with in-situ polymerization modified overspeed coagulation characteristics. The embodiment of the first aspect of the application provides a self-driven penetration-enhanced grouting material, which comprises, by mass, 100-120 parts of self-driven cementing materials, 5-8 parts of driving molecules, 1 part of catalytic promoters, 1-2 parts of toughening agents and 1-3 parts of reinforcing agents, wherein the self-driven cementing materials comprise Portland cement, polycarboxylic acid molecules containing phosphate groups and catalytic nanoparticles, the mass ratio of the polycarboxylic acid molecules to the catalytic nanoparticles is 1:3-5, and the polycarboxylic acid molecules account for 1.6-2% of the mass of the Portland cement. In some embodiments, the driver molecule comprises a mass ratio of 1:3:1 of carboxamide, ammonium bicarbonate, and ammonium carbamate. In some embodiments, the catalytic nanoparticles comprise iron oxide nanoparticles and manganese dioxide nanoparticles in a mass ratio of 1:2. In some embodiments, the catalyst promoter comprises cobalt hydroxide and cobalt chloride in a mass ratio of 1:1. In some embodiments, the toughening agent includes bis (cyclopentadienyl) nickel and nickel acetylacetonate in a mass ratio of 4:1. In some embodiments, the reinforcing agent comprises nickel oxide and cobalt oxide in a mass ratio of 1:1. According to a second aspect of the present application, there is provided a method for preparing a self-driven penetration-enhanced grouting material, comprising the steps of: uniformly mixing polycarboxylic acid molecules and catalytic nano particles according to stoichiometric amount to obtain uniform powder; Uniformly adsorbing the uniform powder on particles of the silicate cement according to stoichiometric amount to obtain the self-driven cementing material; The self-driven cementing material, the driving molecules, the catalytic promoter, the toughening agent and the reinforcing agent are uniformly mixed according to the stoichiometric amount to obtain the grouting material in any embodiment of the first aspect. In some embodiments, the polycarboxylic acid molecules and the catalytic nanoparticles are stirred in a dry powder stirrer at 20 ℃ for 30-40min. In some embodiments, the homogeneous powder and the Portland cement are prepared in a fluid bed jet mill by mechanochemical action and vapor transport-adsorption of fine particles by high velocity jet impact. In some embodiments, the self-driven cementitious material, the driving molecules, the catalytic promoter, the toughening agent, and the reinforcing agent are stirred in a dry powder mixe