Rockburst in Sandstone Containing Elliptic Holes with Varying Axial Ratios

Figure 20

Scatter distribution of AF and RA specimens with different axial ratios. (a) S-1-1. (b) S-1.25-1. (c) S-1.67-1. (d) S-2.5-2.

(a)

(b)

(c)

(d)