Table 1.
The main chemical composition, content (wt. %), and supplier of each raw material.
Table 2.
Particle size distribution of coal gangue.
Fig 1.
Research process of new paste filling material based on industrial by-product FG.
Table 3.
Test scheme based on the trial formulation of new filling material based on industrial by-product FG and the influence of each raw material on its mechanical properties.
Fig 2.
Comparison of the strength of the same proportion when the content of cement, FG, and FGD is 200g.
Fig 3.
Comparison of the strength of the same proportion when the content of cement, FG, and FGD is 300g.
Fig 4.
Effect of lime content on the strength of paste material.
Fig 5.
Effect of mass concentration on the strength of paste material.
Fig 6.
Effect of adding a small amount of cement on the strength of the paste material.
Fig 7.
Effect law of gangue content on the strength of paste material.
Fig 8.
Effect law of PFA on the strength of paste material.
Fig 9.
Effect law of FG on the strength of paste material.
Fig 10.
Effect law of lime on the strength of paste material.
Fig 11.
Effect law of mass concentration on the strength of paste material.
Fig 12.
Schematic diagram of the chemical reaction changes of FG crystals.
Fig 13.
Test equipment for flow performance.
Fig 14.
Effect of coal gangue content on material slump and expansion over time.
Fig 15.
Effect of PFA content on material slump and expansion over time.
Fig 16.
Effect of FG content on material slump and expansion over time.
Fig 17.
Effect of lime content on material slump and expansion over time.
Fig 18.
Effect of mass concentration on material slump and expansion over time.
Fig 19.
Uniaxial compressive stress-strain curve of the sample at 28 days.
Fig 20.
Uniaxial failure characteristics of the sample.
Fig 21.
Triaxial compression stress-strain curve of the sample at 28 days.
Fig 22.
XRD patterns of the materials at 28 days.
Fig 23.
Microstructure of samples at different magnifications for 28d.