Research Article

Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model

Table 1

Elastic block and contact mechanical properties used in the model.

Block properties

WellboreTWC
Young’s modulus51 GPa
Poisson’s ratio0.25
Density2650 kg/m3

Contact properties
WellboreTWC
Normal stiffness5e10 Pa/m5e13 Pa/m
Shear stiffness2.5e10 Pa/m2.5e13 Pa/m
Peak friction angle20°30°
Residual friction angle40°
Dilation angle10°
Peak tensile strengthVariable from distribution
Residual tensile strength0
Peak cohesive strength2.5 tensile strength
Residual cohesive strength0