%0 Journal Article %T Average speed of gravity of motion particles in the bed %A Bykov, V.. %A Kutishchev, D.. %K speed, acceleration, a particle layer separation. %J Actual directions of scientific researches of the XXI century: theory and practice %D 2015 %N 3 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov