Quantitative Identification of Cracks in Jointed Layered Rock Specimens under Uniaxial Compression

Few researchers have looked at the mechanical characteristics of rocks that are composed numerous layers various kinds rock. Most strata in practical engineering composite strata, and fracture propagation is frequently to blame for mishaps. The digital image correlation method (DIC) acoustic emission (AE) equipment were used observe crack strike strain field changes specimens resemble with a constructed joint under uniaxial compression order study growth process failure mode rock compression. research focus this paper conduct quantitative qualitative analysis types based on data obtained from DIC test. covariance matrix was introduced quantify dispersion samples dip angles α = 0°, 15°, 30°, 45°, 60°, 75°. outcomes as follows: displacement two sides quantified using novel method, determined be tensile (type I), shear II), tension–shear I–II); matrix-based parameter V can describe creation spread process; according rate V, identified (0.12 × 10−4–0.49 10−4), (1.17 10−4–4.5 (0.72 10−4–0.99 10−4).