Dynamic Changes in Surface Damage Induced by High-Intensity Mining of Shallow, Thick Coal Seams in Gully Areas

<div>Shear stress distribution of the surface gully slope. (a) Maximum principal stress (<i>σ</i><sub>1</sub>)/MPa. (b) Minimum principal stress (<i>σ</i><sub>3</sub>)/MPa. (c) Maximum shear stress.</div>

Advances in Civil Engineering

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Figure 8

Figure 8: Dynamic Changes in Surface Damage Induced by High-Intensity Mining of Shallow, Thick Coal Seams in Gully Areas 