Mechanism of Fire Prevention with Liquid Carbon Dioxide and Application of Long-Distance Pressure-Holding Transportation Technology Based on Shallow Buried and Near-Horizontal Goaf Geological Conditions

Table 4

Values of density, specific heat, and thermal conductivity for model materials.

	Density (kg/m)	Specific heat (J/(kg·K))	Thermal conductivity (m^2/s)
Coal body	1350	1250	0.15
Rock mass	1650	1650	0.2
CO2	1.78	840	1.45 × 10^−7
O2	1.43	920	2.5 × 10^−6
N2	1.138	1040	0.0242