Table 2 Employed parameters in time-dependent simulation.

From: Unraveling time-dependent roof stability dynamics in Iran's coal mines through laboratory-based rock displacement testing

Parameter

Value

Time independent

 Density (Kg/m3)

2562

 Bulk modulus (GPa)

40.171

 Shear modulus/Mshear (GPa)

26.461

 Cohesion (MPa)

8.340

 Friction angle (Deg.)

30.000

 Tensile strength (MPa)

6.891

Time dependent

 Pre failure

  Mviscosity (GPa × s)

2.74 × 106

  Kshear (GPa)

4.51 × 102

  Kviscosity (GPa × s)

9.92 × 104

 Post failure

  Mviscosity (GPa × s)

2.74 × 105

  Kshear (GPa)

9.03 × 101

  Kviscosity (GPa × s)

1.24 × 103

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