Rockburst in Sandstone Containing Elliptic Holes with Varying Axial Ratios

Figure 16

Rockburst pit profile for specimens with different axial ratios. (a) a : b = 1.0. (b) a : b = 1.25. (c) a : b = 1.67. (d) a : b = 2.5.

(a)

(b)

(c)

(d)