Study on the Physical Properties and Joint Evolution Characteristics of Three-Dimensional Reconstructed Coal

Figure 15

(a) Stress-strain curve for coal sample 4. (b) Joint compacting stage. (c) Elastic deformation stage. (d) Initial expansion phase. (e) Destruction phase. (f) Postpeak stage.

(a)

(b)

(c)

(d)

(e)

(f)