Table 4 The maximum value of maximum and minimum principal stresses of surrounding rock after excavation completion.

From: Impact of excavation footage on vertical shaft lining deformation and surrounding rock stress in Xiyu conglomerate

 

Footage of 2 m

Footage of 3 m

Footage of 4 m

Footage of 6 m

Footage of 8 m

Maximum principal stress/MPa

−3.21

−3.203

−3.206

−3.211

−3.215

Minimum principal stress/MPa

−10.517

−10.399

−10.871

−10.470

−10.733

Ratio

0.305

0.308

0.295

0.307

0.300

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