Research Article

Analysis on Treatment Effect of Mine Tunnel Construction Spring in Karst Area

Table 2

Physical parameters of soil layer and lining.

Soil layer and supportBulk density ()Poisson’s ratioElastic modulus (MPa)Cohesive force (kPa)Friction angle (°)Thickness (m)

Silty clay19.30.3522.594624.415.6
Weathered limestone25.50.26402006704016.7
Shallow strong water area21.30.31200.313028.91.0
General area20.90.31182.812528.11.0
Deep weak water area20.50.33170.211826.71.0
Initial support250.2250000.3