DEVICE FOR ISOLATION OF DEEP-HOLE CHARGE Russian patent published in 2002 - IPC

FIELD: mining industry, in particular, devices for isolation of the deep-hole charge at blasting in the conditions of permafrost. SUBSTANCE: the device is made in the form of a disk of material possessing the shape memory, the disk is outlined by an elastic ring and has guide rods for its centering in the hole, the use of a disk possessing the shape memory provides for an increase or decrease of the disk diameter at variation of the ambient temperature. EFFECT: enhanced efficiency of loading due to a reliable damp proofing of the deep-hole charge. 5 dwg