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

Figure 7

Vertical stress curves of two working conditions. (a) Stress monitoring value of #1 survey line. (b) Stress monitoring value of #2 survey line. (c) Stress monitoring value of #3 survey line. (d) Stress monitoring value of #4 survey line. (e) Stress monitoring value of #5 survey line. (f) Stress monitoring value of #6 survey line.

(a)

(b)

(c)

(d)

(e)

(f)