Table 2.

Geomechanical parameters of coal and rock mass obtained through laboratory testing.

Lithology	Bulk/GPa	Shear/GPa	Tension/MPa	Friction/°	Cohesion/MPa
Mud stone	0.78	0.54	0.99	46	0.54
Sandy mudstone	1.33	1.07	2.52	48	3.33
Siltite	1.23	0.65	1.98	40	1.18
Fine sandstone	1.92	0.89	2.69	52	1.35
Limestone	3.02	2.05	3.84	45	8.20
Coal	0.42	0.22	0.12	36	0.82