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. 2020 Jan 17;15(1):e0227539. doi: 10.1371/journal.pone.0227539

Table 2. Mechanical parameters of materials.

Performance parameters Tensile strength /MPa Yield strength/MPa Shear modulus/GPa Bulk modulus/GPa Cohesion /MPa Internal friction angle /°
Anchoring agent 15 - - - - -
Anchor bolt 570 400 - - 12 32
Surrounding rocks 2.1 0.96 3.3 5.1 4.6 38