[Retracted] Mining Stress Distribution in Stope and Overlying Rock Fracture Characteristics and Its Disaster-Pregnant Mechanism of Coal Mine Earthquake

Figure 8

Fracture height of overlying rock revealed by numerical simulation. (a) Caving 50 m. (b) Caving 100 m. (c) Caving 150 m. (d) Caving 200 m. (e) Caving 250 m. (f) Caving 300 m. (g) Caving 350 m. (h) Caving 400 m.

(a)

(b)

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(d)

(e)

(f)

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(h)