Advances in Civil Engineering / 2018 / Article / Fig 16

Research Article

Shield-Roof Interaction in Longwall Panels: Insights from Field Data and Their Application to Ground Control

Figure 16

Loading degree of a shield-supporting cycle in different longwall retreating timings. (a) 8 h, (b) 15 h, (c) 17.8 h, and (d) 22 h.
(a)
(b)
(c)
(d)

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