METHOD FOR SLOPING OF BENCHES Russian patent published in 1996 - IPC

FIELD: mining and construction; applicable in drilling and blasting operations in reclamation of slopes. SUBSTANCE: in reclamation of slope, drilled from working platform of overlying bench at calculated distance from slope through its mass are line holes on underlying bench located under bench with slope to be formed, and they are fired first, by their length from bottom and for remaining length, they are fired with holes of overlying bench, and, then, new perms are formed. Mathematic formulas for determination of distance of hole mouth from slope and length from bottom of its initial firing. EFFECT: higher efficiency. 1 dwg