Advances in Civil Engineering / 2018 / Article / Fig 6

Research Article

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

Figure 6

Change of shield resistance with longwall retreating time. (a) Two long idle periods in Panel LW22304 of Daliuta mine with hard roof. (b) One idle period in panel LW63 of Cumberland mine with medium-weak roof.
(a)
(b)

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