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Advances in Civil Engineering
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2019
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Article
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Fig 9
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Research Article
Analysis of Overburden Structure and Pressure-Relief Effect of Hard Roof Blasting and Cutting
Figure 9
Variations of roof structure with different cutting positions: (a) 1 m, (b) 3 m, (c) 5 m, and (d) 7 m.
(a)
(b)
(c)
(d)