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

Figure 13

Deformations of the roadways and the supporting arches. (a)–(d): Scheme 10 at the 10^th day, 15^th day, 20^th day, and the 50^th day; (e)–(h): Scheme 13 at the 10^th day, 15^th day, 20^th day, and the 50^th day.