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

<div>Variation in maximum principal stress at 195 mm from the top of the model in SBN-1 and SBN-3 when the displacement is 0.07 mm (initial loading), 8.20 mm (middle loading), and 27.00 mm (late loading).</div>

Advances in Materials Science and Engineering

fig10

Figure 10

Figure 10: Interaction between an Eco-Spiral Bolt and Crushed Rock in a Borehole Evaluated by Pull-Out Testing 