Presplitting Blasting the Roof Strata to Control Large Deformation in the Deep Mine Roadway

Figure 8

Lateral stress of working face of two working conditions. (a) #7 survey line with presplitting blasting. (b) #7 survey line without presplitting blasting. (c) #8 survey line with presplitting blasting. (d) #8 survey line without presplitting blasting. (e) #9 survey line with presplitting blasting. (f) #9 survey line without presplitting blasting. (g) #10 survey line with presplitting blasting. (h) #10 survey line without presplitting blasting. (i) #11 survey line with presplitting blasting. (j) #11 survey line without presplitting blasting.

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