Research Article

Additional Stress on a Buried Pipeline under the Influence of Coal Mining Subsidence

Table 3

Physical mechanical parameters of the buried natural gas pipeline.

Elastic modulus, (GPa)Density, (kg/m3)Linear expansion coefficient, Yield stress, (MPa)Outer diameter, (mm)Thickness, (mm)Internal pressure, (MPa)Ramberg–Osgood model parameters

2107,6801.2 × 10−546566076.41124