File:Longwall history fig 10.jpg

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Caption Figure 10. Longwall face with packed rock to left, props and solid coal face to right. This is the working area for the miners, showing same setting as figure 9. Andros 1915 Figure 27.
Publication Bauer, Robert A., 2015 (version), History of Longwall Coal Mining in Illinois, Illinois State Geological Survey, Unpublished Manuscript Files, pp. 15.

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