Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China

Figure 8

Fracture degree of the surrounding rock around drilling hole. (a) H1-4.0 m, (b) H1-2.9 m, (c) H1-1.9 m, (d) H1-1.0 m, (e) H2-4.7 m, (f) H2-3.45 m, (g) H2-2.44 m, (h) H3-1.6 M, (i) H3-4.75 m, (j) H3-2.74 m, (k) H3-1.72 m, (l) H3-0.85.

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