Numerical Simulation Study on Influence of a Structural Parameter of D Bolt, an Energy-Absorbing Rock Bolt, on its Stress Distribution

Figure 9

Axial stress distributions of bolts in the models supported by D bolts with RSA of (a) 70 : 50 : 40 : 30, (b) 60 : 50 : 40 : 40, (c) 40 : 40 : 50 : 60, and (d) 30 : 40 : 50 : 70.

(a)

(b)

(c)

(d)