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Shock and Vibration
/
2021
/
Article
/
Tab 6
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Research Article
Failure Mechanism and Control of Lower Retracement Channel in Close-Distance Double-Thick Coal Seams
Table 6
Material parameters.
Parameter
γ
(kg/m
3
)
G
(GPa)
K
(GPa)
φ
(°)
σ
t
(MPa)
Value
1340
1.15
3.74
27
0