Failure Mechanism of a Coal-Rock Combined Body with Inclinations of Structural Planes and a Calculation Model for Impact Energy

Figure 10

Curves of cumulative AE energies before failure of CR combined specimens (a) with  = 0°; (b)  = 15°; (c)  = 30°; (d)  = 45°.

(a)

(b)

(c)

(d)