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

<div>Classification of crushed rocks by diameter: (a) mixed sizes of 2–26.5 mm, (b) 4.75–9.75 mm (CR-1), (c) 9.75–14.9 mm (CR-2), and (d) &gt; 14.9 mm (CR-3).</div>

Advances in Materials Science and Engineering

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Figure 4

Figure 4: Interaction between an Eco-Spiral Bolt and Crushed Rock in a Borehole Evaluated by Pull-Out Testing 