Research Article

Experimental Study of Size Effects on the Deformation Strength and Failure Characteristics of Hard Rocks under True Triaxial Compression

Table 3

Controlling rates of each loading stage during the TTC test.

Rock size (mm3)Loading rate of σ3 (MPa/s)Loading rate of σ2 (kN/s)Loading rate of σ1 (kN/s)Deformation rate (mm/min)

50 × 50 × 100 (SL)0.5250012500.008
35 × 35 × 70 (SM)0.51225612.50.0056
25 × 25 × 50 (SS)0.5625312.50.004