Model of Overlying Strata Structure in Large Mining Height Excavating Condition and Calculation of Support Working Resistance

Figure 3

Numerical simulation of overburden failure mode. (a) Open-off cut position; (b) working face advanced to 52 (m); (c) working face advanced to 66 (m); (d) working face advanced to 92 (m); (e) first periodic collapse of basic roof; (f) second periodic collapse of basic roof.

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(b)

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