The Movement Characteristics of Coal Granular Body in Excavating Rescue Channel in the Collapsed Body

<div>0.1 m coal with different natural repose angle and excavation left lower part 1 m × 1 m. (a) Natural repose angle is 16°. (b) Natural repose angle is 26°.</div>

Advances in Civil Engineering

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Figure 10

Figure 10: The Movement Characteristics of Coal Granular Body in Excavating Rescue Channel in the Collapsed Body 