Distribution Characteristics and Formation Mechanism of Surface Crack Induced by Extrathick Near Horizontal Seam Mining: An Example from the Datong Coal Field, China

<div>Top and cross-sectional view of the caving situation. (a) Top view. (b) Cross-sectional view of line <i>AA</i>′. (c) Cross-sectional view of line <i>BB</i>′.</div>

Advances in Civil Engineering

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Figure 2

Figure 2: Distribution Characteristics and Formation Mechanism of Surface Crack Induced by Extrathick Near Horizontal Seam Mining: An Example from the Datong Coal Field, China 

Figure 2 | Distribution Characteristics and Formation Mechanism of Surface Crack Induced by Extrathick Near Horizontal Seam Mining: An Example from the Datong Coal Field, China 