Mechanical Mechanism and Propagation Law of Fissure-Tip Cracks of Large-Size Rock Specimens with Two Precut Fissures

Figure 5

Major crack propagation during the specimen failure. (a) Fissure propagation on the specimen A-1. (b) Fissure propagation on the specimen A-2. (c) Fissure propagation on the specimen B-1. (d) Fissure propagation on the specimen B-2. (e) Fissure propagation on the specimen C-1. (f) Fissure propagation on the specimen C-2.

(a)

(b)

(c)

(d)

(e)

(f)