Numerical Investigation of the Influence of Roof Fracturing Angle on the Stability of Gob-Side Entry Subjected to Dynamic Loading

Table 3

Parameters of the rock strata used in the model.

Rock strata	Density (kg/m^3)	Bulk modulus (GPa)	Shear modulus (GPa)	Friction angle (°)	Cohesion (MPa)	Tensile strength (MPa)
Sandy mudstone	2360	4.56	2.8	32	1.8	0.46
Aluminum mudstone	2400	5.32	3.1	33	2	0.52
Siltstone	2500	6.33	4.38	34	2.3	0.44
Sandy mudstone	2360	4.56	2.8	32	1.8	0.46
Fine sandstone	2600	8.17	4.95	38	2.8	0.63
Mudstone	2250	1.53	1.26	30	1.6	0.42
Siltstone	2500	6.33	4.38	34	2.3	0.44
Fine sandstone	2600	8.17	4.95	38	2.8	0.63
Mudstone	2250	1.53	1.26	30	1.6	0.42
Coal seam	1400	1.42	1.15	28	1.5	0.3
Mudstone	2250	1.53	1.26	30	1.6	0.42
Siltstone	2500	6.33	4.38	34	2.3	0.44
Fine sandstone	2600	8.17	4.95	38	2.8	0.63