Matrix modifier for coal mine dump and preparation method of matrix modifier

• Main Author: SU SHUANGQING
• Format: Patent
• Language: Chinese; English
• Published: 11.11.2022
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to the technical field of soil improvement, and discloses a matrix modifier for a coal mine waste dump and a preparation method thereof.The matrix modifier contains a mineral-based composite material and modified lignite, the mineral-based composite material contains clay mineral, acrylic acid, acrylamide, N, N-methylene bisacrylamide, potassium persulfate and sodium hydroxide, and the modified lignite is modified lignite. The modified lignite is obtained by autoclaving lignite in a potassium hydroxide solution. By using the mineral-based composite material and the modified lignite as raw materials, when the obtained matrix modifier is applied to the matrix of the coal mine waste dump, the water-containing and water-retaining capacity, the organic matter content, the nutrient element content and the aggregate content of soil of the waste dump can be increased, and the soil structure is improved, so that vegetation recovery of the mine waste dump is facilitated; and meanwhile, the matrix