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Advances in Civil Engineering
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2021
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Article
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Tab 1
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Research Article
Movement Laws of Overlying Strata above a Fully Mechanized Coal Mining Face Backfilled with Gangue: A Case Study in Jiulishan Coal Mine in Henan Province, China
Table 1
Mechanical parameters of rock samples.
Strata
Compressive strength (MPa)
Elastic modulus (GPa)
Poisson’s ratio
Cohesion (MPa)
Angle of internal friction (°)
Protodyakonov coefficient
Deformation modulus (GPa)
Sandstone
5.90
69.80
0.16
39.48
35.30
9.30
9.20
Mudstone
3.25
38.90
0.21
47.09
29.20
5.58
7.40