Application of Homogenized Load-Bearing Ring Hypothesis in Roadway Supporting

Table 2

Physicomechanical performance of coal seams and their surrounding rock mass.

Lithology	Bulk modulus (GPa)	Shear modulus (GPa)	Initial cohesion (MPa)	Internal friction angle (°)	Dilation angle (°)
Fine-grained sandstone	5.63	3.15	6.01	27.9	10.3
Mudstone	2.95	1.62	2.18	27.3	12.3
Medium sandstone	7.85	4.56	8.53	29.8	9.7
Coal	1.45	0.76	1.86	37	13.1
Siltstone	4.65	3.36	5.97	23.2	8.2
Sandy mudstone	5.85	3.11	4.33	26.7	15.6