Table 1 Information on rock formations.

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

Testing points

Survey location

Route mileages

Lithology

Occurrence

No.1

Lanni bay

DK249 + 950

Granite

240°∠40°

No.2

Lanni bay

DK250 + 850

Slate

280°∠36°

No.3

Jingzhu Mountain

DK246 + 750

Sandstone

235°∠60°

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