Study on Energy Distribution Law and Numerical Simulation of Mining Roadway Surrounding Rock

Table 1

Mechanical parameters and thickness of layers.

Lithology	Bulk modulus (GPa)	Shear modulus (GPa)	Cohesion force (MPa)	Friction angle (°)	Tensile strength (MPa)	Density (g▪cm^-3)
Siltstone	15.6	10.8	27.25	27	1.17	4.15
Siltstone fine sandstones interbedded	24.3	8.2	39.36	30	4.8	2.1
Coarse sandstone	19.67	9.34	25.47	19	10.14	10.75
Siltstone	15.6	10.8	27.25	27	1.17	1.6
17 coal seam	4.24	1.11	1.51	20	1.90	3.15
Siltstone	15.6	10.8	27.25	27	1.17	3.15
Fine sandstone	20.67	10.10	43.47	19	10.14	2.7
Siltstone	15.6	10.8	27.25	27	1.17	10.6