Subsidence Control Design Method and Application to Backfill-Strip Mining Technology
Table 8
Benefit comparison of different coal mining schemes under buildings.
Mining scheme
Damage level of surface buildings
Village treatment scheme
Minable coal volume (10,000 tons)
Filling cost (ten thousand yuan)
Mining technical issues
Social issues
Backfilling mining
Level I damage
Repair compensation
54
2160
Low coal mining efficiency, and high filling costs
The surface subsidence is small, and the buildings are effectively protected.
Backfill-strip mining
Level I damage
Repair compensation
54
1200
High resource recovery rate and low filling costs
The surface subsidence is small, and the buildings are effectively protected.
Strip mining
Level I damage
Repair compensation
23
—
Low resource recovery rate
The surface subsidence is small, and the buildings are effectively protected.
Caving mining
Level II damage
Village relocation
54
—
The mining technology is mature.
The surface subsidence is large, a large number of buildings need to be relocated, the relocation cost is high, and the surface ecological environment has been destroyed.
