Table 1 Basic experimental conditions for high-temperature rock specimens.

From: Experimental study of strength degradation in fractured surrounding rock of deep high-temperature tunnels

Serial number

High-temperature rock specimen number

Experimental boundary condition

Serial number

High-temperature rock specimen number

Experimental boundary condition/MPa

1

A1

T = 20 °C, uniaxial

9

B4

T = 400 °C, triaxial, confining pressure σ3 = 25

2

A2

T = 150 °C, uniaxial

10

B5

T = 500 °C, triaxial, confining pressure σ3 = 25

3

A3

T = 300, uniaxial

11

C1

T = 20 °C, as the loading path shown in Fig. 3

4

A4

T = 400 °C, uniaxial

12

C2

T = 150 °C, as the loading path shown in Fig. 3

5

A5

T = 500, uniaxial

13

C3

T = 300 °C, as the loading path shown in Fig. 3

6

B1

T = 20 °C, triaxial, confining pressure σ3 = 25

14

C4

T = 400 °C, as the loading path shown in Fig. 3

7

B2

T = 150 °C, triaxial, confining pressure σ3 = 25

15

C5

T = 500 °C, as the loading path shown in Fig. 3

8

B3

T = 300, triaxial, confining pressure σ3 = 25

   
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