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Although coal–gas interactions have been comprehensively investigated, fewer studies consider the impact of thermal effects. In this study, a fully coupled model of coal deformation, gas transport, and thermal transport is developed and solved using the finite element method. A general model is developed to describe the evolution of coal porosity under the combined influence of gas pressure, thermally induced solid deformation, thermally induced gas adsorption change, and gas-desorption-induced solid deformation. This porosity-evolution relationship is implemented into a fully coupled model for coal deformation, gas transport, and thermal transport using the finite element (FE) model. The FE model represents important nonlinear responses due to the effective stress effects that cannot be recovered where mechanical influences are not rigorously coupled with the gas and the thermal transport systems. The …