瞬态径向热流法测定松散煤体变导热系数

hermal conductivity of loose coal is an important parameter to study coal spontaneous combustion. According to the disadvantages of existing measuring methods, based on the 2D radial conduction model, we designed measuring equipment of thermal conductivity with transient radial heat flow method and developed the corresponding calculating model. Through measuring thermal conductivities of different coal samples changing with temperature, the result shows that the thermal conductivity of loose coal increases with increasing temperature. They are changed linearly. The result conforms to the thermal conductive characteristics of loose coal.