Research on Rock Burst Control Mechanism of Deep Buried Tunnel Using Surrounding Rock Modification Theory

Figure 5

Numerical calculation model. (a) Model stress boundary conditions. (b) Tunnel excavation without surrounding rock modification. (c) The modified depth of surrounding rock during tunnel excavation is 3 m. (d) The modified depth of surrounding rock during tunnel excavation is 5 m.

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(b)

(c)

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