Effective Methane Extraction Radius after High-Pressure Water Jet Slotting

Table 1

Parameters for the THM coupling model.

Parameter	Value
Overburden pressure	14.4 MPa
Elastic modulus,	[41]
Poisson’s ratio,	0.28 [42]
Thermal expansion coefficient,	[43]
Methane viscosity,
Coal density,	1400 kg/m^3
Initial porosity,	0.062
Initial permeability,	0.025 mD
Initial methane pressure,	2.0 MPa
Specific heat capacity of coal,	4186 J/(kg·K) [44]
Specific heat capacity of methane,	2227 J/(kg·K)