Numerical Simulation Research on Crack Bifurcation Mechanism of Bidirectional Cumulative Tensile Blasting

Figure 19

Crack propagation after shaped energy blasting. (a) Construction drawing of the shape tube installed before the shaped energy blasting. (b) Schematic diagram after the shape tube installed in the hole. (c) Diagram of the crack propagation of the cohesive direction of the gun hole after the shaped energy blasting. (d) Through cracks between the adjacent holes after the shaped energy blasting [22]. (e) Falling rock along the precrack surface after advanced mining.