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Shock and Vibration
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2021
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Article
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Fig 5
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Research Article
Influence of Valleys Terrain on Pressure of Fully Mechanized Working Faces in Shallow Coal Seams
Figure 5
Breaking of the key stratum in downslope mining. (a) 1
ā2
upper coal seam. (b) 1
ā2
coal seam.
(a)
(b)