An Index for Estimating the Stability of the Layered Rock Masses under Excavation Disturbance

<div>Collapse of tunnel section between stakes K1 + 230 and K1 + 270 in the #3 diversion tunnel.</div>

Advances in Materials Science and Engineering

Figure 6: An Index for Estimating the Stability of the Layered Rock Masses under Excavation Disturbance 