Mechanism of Fracturing in Shaft Lining Caused by High-Pressure Pore Water in Stable Rock Strata

Table 3

The range value of f(n₀, N).

N	4	6	8	12	20
f(n0, N)	3.0~7.8	1.8~3.0	1.5~2.0	1.2~1.6	1.0~1.4