Investigation on Surrounding Rock Stability Control Technology of High Stress Roadway in Steeply Dipping Coal Seam

Table 1

Micromechanical parameters of each layered rock of the model.

Lithology	Block parameters			Contact surface parameters
	Density (kg·m^−3)	Elastic modulus (GPa)	Bulk modulus (GPa)	Shear modulus (GPa)	Friction angle (^o)	Cohesion (MPa)	Tensile strength (MPa)
Carbonaceous mudstone	2 500	5.30	24.40	9.70	18	1.5	0.5
Coal seam	1 300	2.60	11.50	4.60	14	0.8	0.32
Mudstone	2 500	3.80	24.40	9.70	18	1.3	0.4
Sandstone	2 500	10.04	28.70	9.50	21	0	0