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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)