Experimental Study on Mudstone’s Strength Characteristics in Deep-Buried Coal-Measure Formation: A Case Study of Permian Longtan Formation

Figure 9

Stress-strain relationships of uniaxial compression test. (a) 617. (b) 621. (c) 622. (d) 623. (e) 624. (f) 625.

(a)

(b)

(c)

(d)

(e)

(f)