Advances in Civil Engineering / 2021 / Article / Fig 15

Research Article

Study on the Retention of Large Mining Height and Small Coal Pillar under Thick and Hard Roof of Bayangaole Coal

Figure 15

Relative displacement curve of roadway roof and floor at different pillar widths. (a) Vertical displacement curve. (b) Horizontal displacement curve of two sides.
(a)
(b)

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