Study on Pressure Relief Effect of Rock Mass with Different Borehole Parameters

Figure 16

Stress-time-AE counts of samples with different borehole height ratio. The R of (a), (b), (c), (d), and (e) are 0.1, 0.3, 0.5, 0.7, and 0.9, respectively.

(a)

(b)

(c)

(d)

(e)