Roof Failure Mechanism and Control Technology of Large Section Open-Off Cut in Soft Rock Strata with Thin Thickness

Figure 10

The distribution of plastic zone in different lithologies. (a) C = 0.6, Φ = 25°, (b) C = 0.9, Φ = 25°, (c) C = 1.2, Φ = 25°, (d) C = 1.5, Φ = 25°, (e) C = 1.2, Φ = 20°, (f) C = 1.2, Φ = 25°, (g) C = 1.2, Φ = 30°, (h) C = 1.2, Φ = 25°.

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