Table 1 Mechanical parameters of m30 cement mortar.

From: Influence of tunnel excavation on the magnitude and rotation angle of principal stress in surrounding rock

Elastic modulus/GPa

12.54

Poisson’s ratio

0.26

Density/Kg m− 3

2000

Cohesion/MPa

6.62

Angle of internal friction

42

Uniaxial compressive strength/MPa

35.42

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