Experimental Study on Backfilling Mine Goafs with Chemical Waste Phosphogypsum

Figure 12

Relation curve of on-way resistance and PGBS speed in different backfill concentrations. Graphs in (a–f) indicate the PGBS concentrations of 62%, 64%, 65%, 66%, 67%, and 68%, respectively.

(a)

(b)

(c)

(d)

(e)

(f)