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

Figure 7

Scheme of deep hole and shallow hole blasting. (a) Front view. (b) Side view. (c) Vertical view. (d) Schematic diagram of charging explosives for deep hole blasting. (e) Schematic diagram of charging explosives for shallow hole blasting.

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