Study on the Strata Movement Rule of the Ultrathick and Weak Cementation Overburden in Deep Mining by Similar Material Simulation: A Case Study in China

Figure 12

Failure mode of ultrathick weak cementation overburdens: (a) the working face 2202 was 60 m in width; (b) the working face 2202 was 120 m in width; (c) the working face 2202 was 180 m in width; (d) the working face 2202 was 240 m in width; (e) the working face 2202 was 300 m in width.

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(b)

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