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Table 3 Experimental summary for the indirect tensile deformation experiments performed for this study

From: Estimating in situ rock mass strength and elastic modulus of granite from the Soultz-sous-Forêts geothermal reservoir (France)

Sample number

Presence of phenocrysts

Average thickness (mm)

Average diameter (mm)

Load at tensile rupture (kN)

σt (MPa)

4B_2

No

20.14

40.12

5.80

4.17

4B_3

No

24.16

40.12

5.52

3.62

7B_1

No

20.05

40.20

4.90

3.88

7B_2

No

23.81

40.09

6.40

4.27

4B_1

Yes

22.44

40.22

7.12

5.03

4B_4

Yes

21.23

40.18

4.98

3.55

7B_3

Yes

22.13

40.15

7.83

5.61

7B_4

Yes

22.26

40.13

5.65

4.02

  1. σ t —indirect tensile strength (calculated using Eq. 2)