Large-Deformation Failure Mechanism of Coal-Feeder Chamber and Construction of Wall-Mounted Coal Bunker in Underground Coal Mine with Soft, Swelling Floor Rocks

Table 2

Mechanical parameters of floor strata after immersed in water for 36 h.

Strata	Elasticity modulus (MPa)	Bulk modulus (GPa)	Shear modulus (GPa)	Friction angle (°)	Cohesion (MPa)
Mudstone	1860	1.20	0.75	20	0.36
Clay	1650	1.30	0.64	18	0.22