PROCESS OF BLAST CUTTING OF THICK-WALLED STRUCTURES Russian patent published in 2003 - IPC

FIELD: blasting operations, blast cutting of metal, concrete and reinforced concrete structures of various forms and dimensions. SUBSTANCE: process of blast cutting of thick- walled structures includes placement of explosive charge on surface to be cut and its initiation carried out simultaneously by means of opposing pulses perpendicular to section over entire length. Auxiliary explosive charge is positioned on side surface of structure in point of anticipated cut and is time-initiated . Auxiliary explosive charge is worked into structure to be cut. Additional auxiliary explosive charge is placed on opposite side surface of cut structure. Explosive charges are initiated simultaneously or with delay. EFFECT: enhanced efficiency of blast cutting of thick-walled structures of various form and profile. 4 cl, 6 dwg