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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