Table 1.

Material properties used in model

Material typePorosityPermeabilityDensityYoung's modulusPoisson's ratio
ηk (m2)ρ (kg m−3)E (Pa)v
Overburden0.15 [1]1.2 × 10−13 [1]2600 [2]2.5 × 108 [3]0.25 [4, 5]
Pillar (coal)0.02 [6]1.0 × 10−14 [7]1500 [8]4.0 × 108 [9]0.25 [4]
Stall (water)1.001.0 × 10−1010002.5 × 1060.25
  • Sources in square brackets: 1BGS (2015), 2Malolepszy (2003), 3Dethlefsen et al. (2016), 4Murali Mohan et al. (2001), 5Duncan Fama et al. (1995), 6Holloway et al. (2002), 7Durucan & Edwards (1986), 8Ordóñez et al. (2012), 9Salmi et al. (2017).