### (PDF) Mass Angle of Repose of Open-Graded Rock Riprap

Mass Angle of Repose of Open-Graded Rock Riprap. Multiple regression analysis of measurements at 74 stockpiles of dumped natural and crushed rock shows the angle to depend primarily on rock particle angularity and, to lesser extents, on the gradation and the median particle diameter of the stone mixture, the angle increasing with angularity,...