Search U.S. government technical reports digitized or harvested by TRAIL.
Design of underground mine openings oil-shale mine, Rifle, Colo.
Roof-span studies in limestone
Method of determining the strength of a mine roof
Oil-Shale mine, Rifle, Colo. :a review of design factors
Deformation of a borehole in rock
Determining the in-place support of mine roof with rock bolts, White Pine Copper Mine, Michigan
Borehole deformation gage for determining the stress in mine rock
Changes in stress concentration created by undercutting in block caving
Three-component borehole deformation gage for determining the stress in rock