Failure Mechanism and Optimization of Arch-Bolt Composite Support for Underground Mining Tunnel

Figure 14

Main results of Scheme 14. (a) Arch axial force curves. (b) arch supporting forces. (c) Surrounding rock plastic zones and supporting structure inner force diagrams. (d) Comparative columns of the surrounding rock control effect of Scheme 14 and Scheme 4.

(a)

(b)

(c)

(d)