Effects of High-Pretension Support System on Soft Rock Large Deformation of Perpendicularly Crossing Tunnels

Table 2

. Mechanical parameters of carbonaceous slate.

Lithology	Rock mass parameters						Homogeneous joint parameters
	Density (kg/m^3)	K (GPa)	G (GPa)	C^b (MPa	φ^b	σ^bt (MPa)	K^n (GPa)	k^s (GPa)	C^j (MPa)	φ^j	σ^jt (MPa)
Carbonaceous slate	2500	0.56	0.27	1.68	23	0.6	9.53	0.38	3.75	29	3.45