Critical Length and Collapse of Interlayer in Rock Salt Natural Gas Storage

Table 3

Physical and mechanical characteristics of rock.

Type of rock	ρ (kg·m^−3)	E (GPa)	μ	c (MPa)	φ (°)	σt (MPa)
Interlayer	2500	4.28	0.205	1.2	32	0.6
Rock salt	2200	3.60	0.282	1.0	40	0.4