Study on the Safety Thickness of Three Zones against Fault Water Inrush: Case Study and Model Development

Table 1

Physical and mechanical properties of rock.

Lithology	μ	E (GPa)	ϕ (°)	C (MPa)	(MPa)	(KN·m^−3)
Medium sand	0.22	38	30	8.65	33	27.9
Fine sandstone	0.18	45	35	4.75	44	26.5
Siltstone	0.25	26	32	2.37	34	25.4
#10 coal	0.27	18	28	2.1	11	14.0
Mudstone	0.23	20	32	2.03	28	25.0
Limestone	0.23	66	30	4.5	35	26.6
Mud-sandstone interbedding	0.22	29	31	3.7	30	26.4