Numerical Analysis of the Effect of Heterogeneity on Underground Roadway Stability under Dynamic Loads

Table 3

Rock mass properties.

Lithology	K (GPa)	G (GPa)	c (MPa)	Φ (°)	cr (MPa)	εp (%)
Sandstone	9.1	5.9	3.9	45	0.39	0.01
Sandy mudstone	5.2	3.1	3.2	40	0.32	0.01
Mudstone	2.4	1.1	2.1	35	0.21	0.01
Coal	1.3	0.6	1.4	31	0.14	0.01
Sandy mudstone	7.2	4.0	3.4	37	0.34	0.01
Siltstone	9.6	6.5	4.2	47	0.42	0.01