The Mechanical and Fracturing of Rockburst in Tunnel and Its Acoustic Emission Characteristics

<div>Loading process (I: initial loading; II: maintaining the loading number in two directions; III: detaching the filling body; IV: maintaining the loading number in two directions; V: loading in the vertical direction again).</div>

Shock and Vibration

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Figure 3

Figure 3: The Mechanical and Fracturing of Rockburst in Tunnel and Its Acoustic Emission Characteristics 