Study on the Mechanical Relationship among the Backfilling Mining Support, Roof Rock Beam, and Gangue Filling Body in Comprehensive Mechanized Filling Mining Process
Table 1
Combination design of wood and sponge for different filling ratios.
No.
Height of high-density foam (cm)
Height of low-density foam (cm)
Height of sponge (cm)
Height ratio (high-density foam:low-density foam:sponge)
