Interaction between an Eco-Spiral Bolt and Crushed Rock in a Borehole Evaluated by Pull-Out Testing

<div>Relationship between axial resistance force and displacement for various sizes of eco-spiral bolt with widths of (a) 32 mm (SB-1), (b) 38 mm (SB-2), and 50 mm (SB-3). Each eco-spiral bolt is 9 mm thick and 600 mm long.</div>

Advances in Materials Science and Engineering

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Figure 5

Figure 5: Interaction between an Eco-Spiral Bolt and Crushed Rock in a Borehole Evaluated by Pull-Out Testing 