The Spatiotemporal Characteristics of Coupling Effect between Roof and Backfill Body in Dense Backfill Mining

Figure 10

Deformation diagram of overlying strata during the backfill process.

(a) Before excavation and backfilling

(b) The backfill distance is 20 m

(c) The backfill distance is 40 m

(d) The backfill distance is 60 m

(e) The backfill distance is 80 m

(f) The backfill distance is 100 m

(g) The backfill distance is 110 m

(h) Stand for 12 hours after stopping mining