PROCESS OF THROWING DAM ACROSS CANYON BY BLAST Russian patent published in 1998 - IPC

FIELD: usage of blasts in construction industry. SUBSTANCE: technical result of invention consists in throwing dam of specified height with least expenditures by usage of rational parameters of blast with due account of laws of action of discharge charge in edges of rock canyon established experimentally. Mentioned technical result in throwing dam is achieved by employment of line charges in rock canyons for blasting which includes working of approaching and charging roadways in ground mass of one or both edges of canyon, single-level positioning of charges, tamping of approaching roadways and consistent blasting of charges. Line of least resistance of charge with usage of one or two line charges, delay interval between blasting of first and second charges and distance between horizon of positioning of charges and level of NPU of water are chosen by calculated dependencies. EFFECT: increased efficiency of throwing dam of specified height with least expenditures. 12 dwg, 2 tbl