Research Article
[Retracted] Study on Dynamic Evolution of Overburden Rock Movement and Mining-Induced Stress of Ultra-high Working Face
Figure 3
Distribution characteristics of maximum principal stress under different propulsion distances: (a) advance 32 m, (b) advance 96 m, (c) advance 160 m, (d) advance 224 m, (e) advance 288 m, and (f) advance 352 m.
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