The Stability Evaluation of Shaft during Drastic Drawdown Dewatering of Alluvium

Table 2

Linear elastic model parameters of the well wall and weathering zone.

Serial no.	Lithology	Buried depth (m)	Density (g·cm^−3)	Elastic modulus E (MPa)	Poisson’s ratio	Lateral pressure coefficient K0	Horizontal permeability coefficient Kns	Vertical permeability coefficient Kvs	Initial void ratio e0
9	Bedrock	260	2.5	25000	0.25	0.19	7.5 × 10^−5	7.5 × 10^−5	0.21
10	Shaft wall		2.4	25000	0.167