Table 2: The nozzles’ critical rock-breaking injection rate.

Nozzle 7-hole nozzle 16-hole nozzle
Working liquid Pure water 4% liquid-solid Pure water 4% liquid-solid
Nozzle position Center 1 Outer 6 Center 1 Outer 6 Center 1 middle 5 Outer 10 Center 1 middle 5 Outer 10
Critical Q(m3·min-1) 0.9416 1.1553 0.8833 1.0598 0.7115 1.6786 1.5692 0.641 1.3184 1.4439
Rock-breaking Q(m3·min-1) 1.1553 1.0598 1.6786 1.4439