Research on Stability Control Technology of Mining Roadway Based on Energy Transformation

Table 2

Mechanical parameters and thickness of surrounding rock.

Rock formation	Bulk modulus/GPa	Shear modulus/GPa	Cohesion/MPa	Internal frictional angle/°	Tensile strength/MPa	Density/kg·m^-3	Thickness/m
Fine sandstone4	17.2	10.4	4.46	32	2.18	2568	2.35
Siltite2	18.5	11.3	3.54	31	2.35	2640	1.09
Middle sandstone3	19.8	12.1	2.36	28	1.98	1395	4.55
Fine sandstone3	10.3	9.8	3.25	32	2.62	2608	3.2
Siltite1	19.5	11.3	3.89	30	3.20	2568	1.38
91Coal	7.4	3.5	2.38	25	1.68	1398	1.35
Middle sandstone 2	19.8	12.1	2.36	28	1.98	1395	1.56
Fine sandstone 2	10.5	9.5	3.25	32	2.62	2608	2.2
90 coal	7.3	3.4	2.19	26	1.52	1396	0.85
Middle sandstone 1	19.8	12.1	2.36	28	1.98	1395	1.0
Fine sandstone 1	10.2	9.3	3.25	32	2.62	2608	5.95