Analysis of Stress Asymmetric Distribution Law of Surrounding Rock of Roadway in Inclined Coal Seam: A Case Study of Shitanjing No. 2 Coal Seam

Table 1

Numerical simulation of physical and mechanical parameters of coal and rock.

Rock stratum	Thickness (m)	Density (kg·m^−3)	Bulk modulus (GPa)	Shear modulus (GPa)	Friction (°)	Cohesion (MPa)	Tension (MPa)
(1) Siltstone	4.6	2 460	8.49	6.47	32.1	5.7	3.77
(2) Medium grain sandstone	4	2 510	10.11	7.27	37.0	11.8	2.78
(3) Mudstone	2.9	2 530	7.79	5.34	31.5	1.85	1.54
(4) Coal seam	5.5	1 400	1.80	0.83	21.0	1.60	0.50
(5) Siltstone	9.2	2 460	8.49	6.47	32.1	5.7	3.77