Experimental Study on Physicomechanical Properties of Deep Sandstone by Coupling of Dry-Wet Cycles and Acidic Environment

Figure 9

Stress-strain curve of sandstone specimens after A-D-W cycle: (a) pH = 4 group, (b) pH = 5 group, (c) pH = 6 group, and (d) pH = 7 group.

(a)

(b)

(c)

(d)