Analysis of Support Design in Weak Rock Drift Using a Systematic Approach

Table 5

Detailed design parameters of different support systems.

	Sophisticated support (Figure 9(a))	Support suggested by Q-system (Figure 9(b))	Combination support system (Figure 9(c))
Steel set	100 mm wide	—	—
Shotcrete	150 mm thickness	90 mm thickness reinforced fiber shotcrete	100 mm thickness, 150 mm thickness
Rock bolt	—	1.3 m × 1.3 m pattern of 2 m long, 20 mm diameter, fully resin grouted rebar	1 m × 1 m pattern of 2.5 m long, 20 mm diameter, fully resin grouted rebar
Cable bolt	—	—	1.5 m × 1.5 m pattern of 4.5 m long, fully cement grouted
Wire mesh	—	#0 gauge mesh	#0 gauge mesh
Steel strap	—	—	#4 screen

Gauge mesh is a standard specification wire mesh.