Abstract
The effective thermal conductivity of coal is tested by Hot disk, and the specific heat of coal is measured by differential scanning calorimetry. The results show that the higher the volatile content of coal is, the lower the effective thermal conductivity and the higher the specific heat. However, the ash content is positively correlated with the effective thermal conductivity and specific heat. The greater the P-wave and S-wave are, the greater the effective thermal conductivity. The calculation results of the grey relational analysis show that the main factor affecting the effective thermal conductivity is the mechanical properties of coal, and the main factor affecting the specific heat is the fixed carbon in coal. Compared with sandstone and mudstone, the linear correlation coefficient between the industrial components of coal and both the thermal conductivity and specific heat are lower, and the effective thermal conductivity is more affected by the structure.
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