Experimental Study on the Basic Properties of a Green New Coal Mine Grouting Reinforcement Material
ACS Omega, 5(27):16722 - 16732, 2020.
Summary
A grouting material for reinforcing coal-mine floors is developed from waste tire rubber, fly ash, clay, and additives. The study links reuse of solid waste with the need to limit water inrush through fractured or weakened floor strata. Laboratory investigations evaluate mixture proportions, uniaxial compressive strength, permeability, stability in mine-water conditions, and microstructure. Scanning electron microscopy complements the bulk measurements by examining the internal fabric of the hardened grout. The reported optimized mixture contains 20% rubber particles, 65% fly ash, and 15% clay, with 1% nanosilica as an additive. Selection balances material cost, bonding, and dense filling while making extensive use of waste products. The experimental results provide a basis for assessing this material in floor-grouting applications and for considering larger-scale use of these industrial wastes.