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Shock and Vibration
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Shock and Vibration
/
2021
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Article
/
Tab 2
/
Research Article
Failure Mechanism and Control of Lower Retracement Channel in Close-Distance Double-Thick Coal Seams
Table 2
Strain-softening parameters.
Properties
ε
p
ε
r
C
r
(MPa)
Φ
r
(°)
Value
0.007
0.013
0.23
11.4
Note:
C
r
is residual cohesion and Φ
r
is the residual friction angle.