METHOD FOR MAKING CAVITIES IN HARD GROUND

摘要

The method provides for making loosening holes (3) and two rows of contour holes (1, 2) situated along the periphery of the cavity to be made at a distance delta >/= Wo, where delta is the distance between the rows of the contour holes, in m; Wo is the value of the ground displacement on explosion in the loosening holes, in m. All the holes are charged with explosives and exploded, starting with the central part of the cavity to be made.