Mechanical Model of Underground Shaft Coal Pocket and Deformation of Silo Wall in Coal Mines

Table 1

Physical and mechanical parameters of rock mass used in numerical simulation.

Rock type	Density (kg·m^−3)	Internal friction angle (°)	Tensile strength (MPa)	Elastic modulus (GPa)	Cohesion (MPa)	Poisson ratio
Coal	1430	39.5	0.2	0.10	0.42	0.32
Concrete silo wall C30	2385	54.9	1.0	30	3.18	0.2