Advances in Civil Engineering / 2018 / Article / Tab 1

Research Article

Numerical Investigation of Complex Thermal Coal-Gas Interactions in Coal-Gas Migration

Table 1

Parameters of the model.


Young’s modulus of coal, E (MPa)2713[22]CH4 Langmuir volume constant, VL (m3/kg)0.043[22]
Young’s modulus of the coal grains, Es (MPa)4070[22]Specific heat capacity of gas, Cg (J/kg·K)1.625 × 103[16]
Initial porosity, (—)0.01[22]Specific heat capacity of coal, Cs (J/kg·K)1.25 × 103[16]
Density of coal, (kg/m3)1250[22]Pressure coefficient, c1 (MPa−1)0.07[16]
Poisson’s ratio of coal, (—)0.34[22]Sorption strain coefficient, (kg/m3)0.06[18]
Initial gas permeability, (m2)1.09 × 10−18[22]Volumetric coefficient of matrix, (K−1)2.4 × 10−5[18]
Density of CH4 at standard condition, (kg/m3)0.717[16]Klinkenberg effect, b (Pa)1.44 × 105[18]
Gas dynamic viscosity, (N·s/m2)1.84 × 10−5[16]Temperature coefficient, c2 (K−1)0.02[16]
CH4 Langmuir pressure constant, PL (MPa)1.57[16]Thermal conductivity of coal, (J/(m·s·K))0.2[16]

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