The contribution of fibers to the strength of fiber-reinforced soils is very much dependent on the distribution of orientation of the fibers. The fibers in the direction of largest extension contribute most to the strength of the composite, whereas the fibers ...

This report presents results of a U.S. Bureau of Mines study of longwall gob material. The objective of this work was to determine material stiffness properties of the gob for use in numerical models of rock mass response to longwall mining. Photographs of ...