Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation

Figure 14

The experimental schemes for the blasting methods. (a) Single-borehole blasting interval one hole. (b) Double-borehole blasting interval one hole. (c) Three-borehole blasting interval one hole. (d) Four-borehole blasting interval one hole. (e) Five-borehole blasting interval one hole.

(a)

(b)

(c)

(d)

(e)