Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock

Table 1

Rock physical and mechanical parameters table.

Strata	Thickness (m)	Density (kg m^−3)	Bulk modulus (GPa)	Shear modulus (GPa)	Cohesion (MPa)	Tensile strength (MPa)	Friction (°)
Upper rock mass	6	2600	8.82	4.63	4.0	2.6	34
Mudstone	4	2570	13.4	7.5	2.5	1.8	32
10^# coal seam	2.4	2570	13.4	7.5	1.8	1.8	32
Siltstone	2.4	2580	3.3	2.5	1.6	1.3	25
Mudstone	4	2461	6.08	3.47	1.7	1.3	25.5
11^# coal seam	3.2	2620	7.52	3.1	1.9	1.2	26
Mudstone	4.4	2660	5.7	3.4	1.8	1.7	26
Al mudstone	3.2	2463	3.94	2.6	1.7	1.6	25
Quartz sandstone	2	2500	3.68	2.15	1.5	1.12	28
Lower rock mass	8.4	2695	5.2	4.1	3.3	2.12	35