A Study of Fractal Deep-Hole Blasting and Its Induced Stress Behavior of Hard Roof Strata in Bayangaole Coal Mine, China

<div>Comparison of max principal strain. (a) Comparison of “straight-line” blasting layout and “triangle-fractal” blasting layout. (b) Comparison of “straight-line” blasting layout and “deep-shallow-fractal” blasting layout.</div>

Advances in Civil Engineering

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Figure 17

Figure 17: A Study of Fractal Deep-Hole Blasting and Its Induced Stress Behavior of Hard Roof Strata in Bayangaole Coal Mine, China 