Presplit Blasting Technique in Treating Hard Overlying Strata: From Numerical Simulation to Field Practice

<div>The evolution of the effective stress in the surrounding rock at different times. (a) <i>T</i> = 1.1 ms. (b) <i>T</i> = 2.3 ms. (c) <i>T</i> = 3.6 ms.</div>

Advances in Civil Engineering

fig7

Figure 7

Figure 7: Presplit Blasting Technique in Treating Hard Overlying Strata: From Numerical Simulation to Field Practice 