Seismic Response Analysis of Deep Underground Roadways and Coal Pillars under the Influence of the Adjacent Goaf

Table 2

Physical and mechanical parameters used in the model.

Name of coal and rock mass	Bulk modulus (GPa)	Shear modulus (GPa)	Density (kg/m^3)	Cohesion (MPa)	Internal friction angle (°)
Siltstone	9.1	3.8	2500	16	37
Mudstone	6.6	2.2	2550	10	35
Fine sandstone	9.2	4.0	2700	20	43
Coal	3.1	1.5	1420	5	22
SDSH	5.9	2.5	2620	13	29
Medium-grain sandstone	8.7	4.1	2500	18	40