Fig 1.
Support system with backfill body, coal pillar, and load-bearing strata.
Fig 2.
Variation of packing density with the diameter ratio of unequal spheres.
Table 1.
Results of aeolian sand sieving test.
Fig 3.
Gradation curves of aeolian sand.
Fig 4.
Variation bar for different ratios of aeolian sand to cement.
Fig 5.
The viscosity and shear stress of slurry at different concentrations.
Fig 6.
The location of coal mine and route of backfill coal mining.
Fig 7.
Whole backfill space sealing in the mining face.
Fig 8.
The strength test values of the backfill body.
Fig 9.
Position of surface subsidence curve and working face.