Abstract
This paper treats the generated forces between the roller and the table,when a roller is rolling on the powdered coal spread over a table.The force ratio of the horizontal and vertical is investigated for the different distribution of the particle size and the different moisture conditions of the powdered coal.We found that these forces depend on "the running velocity of the roller","the powdered coal's particle size" and "the quantity of moisture in the powdered coal".To examine dynamic characteristics of the generated force, we employ a viscoelastic model with a serial spring and dashpot. For the difference moisture conditions, the model parameters are identified using the least squares method. The identified model parameters depend on "the running velocity of the roller" and "the quantity of moisture", but are not always identical to the experimental results.
