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Table 2 Experimental summary for the compressive 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 Depth (m) Presence of phenocrysts Bulk dry density (kg/m3) Connected porosity Confining pressure (MPa) Compressive strength (MPa) Static elastic modulus (GPa)
1 1420 Not noted 2652 0.0030 0 123.6 N/A
2 1420 Not noted 2650 0.0029 0 N/A N/A
3 1915 Not noted 2696 0.0018 0 129.2 N/A
4 1915 Not noted 2686 0.0018 0 128.4 N/A
5 1915 Not noted 2682 0.0020 0 146.9 N/A
3A 1558 No 2679 0.0012 0 153.1 53.3
6A 1558 No 2658 0.0012 0 144.6 48.9
2A 1558 No 2672 0.0012 5 263.0 44.1
3C 1558 No 2671 0.0011 10 296.8 57.3
4A 1558 No 2678 0.0011 20 369.5 35.2
5A 1558 No 2666 0.0012 30 433.3 32.9
1A 1558 Yes 2667 0.0012 0 140.6 36.6
2C 1558 Yes 2669 0.0012 0 152.4 47.2
1C 1558 Yes 2656 0.0011 5 255.9 26.0
2B 1558 Yes 2665 0.0009 10 277.2 34.0
3B 1558 Yes 2686 0.0011 20 363.3 35.6
8B 1558 Yes 2639 0.0016 30 380.6 32.0
  1. Experiments were performed at a constant strain rate of 10−5 s−1. As noted in the text, the static elastic modulus could not be determined for the samples recovered from depths of 1420 and 1915 m due to technical problems