Research Article
Study on Energy Release of Surrounding Rock under the Multiple Unloading Disturbance during Tunnel Excavation
Figure 8
Calculation model and energy change of surrounding rock masses under multiple unloading (J/m3). (a) Calculation model. (b) Initial energy state. (c) ms1. (d) ms3. (e) ms5. (f) ms7. (g) ms9. (h) ms11.
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