Application of Presplitting Blasting Technology in Surrounding Rock Control of Gob-Side Entry Retaining with Hard Roof: A Case Study

Figure 5

Construction of presplitting blasting model and evolution process of stress wave state. (a) Geometric model of presplitting blasting simulation. (b) T = 25 μs. (c) T = 40 μs. (d) T = 60 μs. (e) T = 113 μs. (f) T = 133 μs.

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