Application and Principle of Bolt-Mesh-Cable Control Technology in Extremely Soft Coal Seam Roadway

Table 3

Mechanical parameters of U-shaped shed.

Support material	Model	Cross sectional area/cm^2	Theoretical weight/kg/m	Allowable stress/MPa	Allowable bending moment/kN·m
U-shaped shed	36 U	45.7	35.8	520	40