Modeling Rock Fracture Propagation and Water Inrush Mechanisms in Underground Coal Mine

Table 1

Values of the parameters used to describe the properties of the strata.

Lithology	Thickness (m)	Compressive strength (MPa)	Tensile strength (MPa)	Density (kg/m^-3)	Young’s modulus (GPa)
Mudstone	24.0	15.7	1.4	2500	10.9
16 coal	7.8	10.4	1.0	1400	10.0
Siltstone	16.2	58.7	4.2	2600	6.4
Mudstone	17.8	15.6	1.4	2500	10.9
Limestone	10.0	35.0	1.8	2700	44.2