Table 7 The energy method analyzes the assessment results.

From: Unloading damage evolution and rockburst risk assessment of Xuefengshan No.1 tunnel by combining multiple approaches

lithology

Burial depth (m)

Deformation energy index

Wet

Rock burst degree

Granite

600

5.42

High-level rock burst

Slate

700

3.55

Moderate- or low- level rock burst

Sandstone

800

1.98

No rock burst

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