Study on Energy Release of Surrounding Rock under the Multiple Unloading Disturbance during Tunnel Excavation

<div>Adjustment history curve of the energy storage limit and strain energy density. (a) Layout of the Jinping Underground Laboratory. (b) In situ stress field of the Jinping Underground Laboratory.</div>

Mathematical Problems in Engineering

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Figure 3

Figure 3: Study on Energy Release of Surrounding Rock under the Multiple Unloading Disturbance during Tunnel Excavation 