Study on Anchor Cable instead of Single Hydraulic Prop Support in Advance Support of Deep Roadway

Table 2

The physical and mechanical parameters of surrounding rock.

Rock category	Thickness (m)	Shear modulus (GPa)	Bulk modulus (GPa)	Cohesion (MPa)	Internal friction angle (°)	Tensile strength (MPa)
Siltite	27	2.8	7.21	3.1	33	0.8
Mudstone	17	4.13	2.41	1.78	25	0.7
Siltite	1.3	2.5	6.8	2.8	31	0.8
Mudstone	6.2	4.2	2.45	1.8	26	0.9
Coal seam	4.5	1.35	2.13	1.21	30	0.12
Mudstone	7	4.19	2.48	1.75	34	0.8
Fine sandstone	22	2.8	7.21	3.1	33	0.8
Siltite	15	3.05	7.25	3.5	32	0.8