Study on Roof Presplitting Mechanism and Deformation Control of Reused Roadway in Compound Soft Rock by Roof Presplitting Approach

Figure 9

Stress distribution of the Reused roadway roof at the heights of (1) 9 m, (2) 18 m, and (3) 27 m.

(a) 0 m

(b) 0.5 m

(c) 1 m

(d) 1.5 m

(e) 2 m