Experimental Study on Creep Behavior and Crack Evolution of Stratified Structural Sandstone under Segmental Constant Load

Figure 9

Constant load test curve of rock samples from the USV group.

(a) USV-1 sample

(b) USV-2 sample

(c) USV-3 sample

(d) USV-4 sample

(e) USV-5 sample

(f) USV-6 sample

(g) USV-7 sample

(h) USV-8 sample