Stabilization Mechanism and Safety Control Strategy of the Deep Roadway with Complex Stress

Table 1

The physical and mechanical properties of roadway surrounding rock.

Lithology	Bulk density (kN·m^−3)	Thickness (m)	Compressive strength (MPa)	Elastic modulus (GPa)	Poisson ratio	Interfriction angle (°)	Cohesion(MPa)	Tensile strength (MPa)
Fine sandstone	27.5	32	25.7	10.0	0.20	40	6.0	6.0
Sandy mudstone	25.3	8.0	9.4	3.5	0.22	34	2.5	2.5
No. 15 coal seam	13.6	3.5	4.2	2.5	0.25	19	1.5	1.5
Mudstone	24.5	3.5	7.2	2.5	0.23	32	2.0	2.0
No. 16 coal seam	13.6	6.5	4.7	2.0	0.23	32	1.5	1.4
Fine sandstone	27.5	5.0	25.7	10.0	0.20	40	6.0	6.0
Sandy mudstone	25.3	12	9.4	4.5	0.22	34	5.0	3.2
Limestone	28.0	13	30	10.0	0.20	40	8.0	7.2