Advances in Civil Engineering / 2021 / Article / Fig 16

Research Article

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

Figure 16

Stress nephogram at 130 m stope. (a) Width of pillar is 5 m. (b) Width of pillar is 10 m. (c) Width of pillar is 15 m.
(a)
(b)
(c)

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