METHOD TO ERECT ROCK-FILL STRUCTURES BY DIRECTED BLASTING OF A ROCK MASSIF

摘要

1319229 Blasting subaqueous structures GOSUDARSTVENNY TREST PO PROIZVODSTVU BURO-VZSYVNYKH RABOT "SOJUZVZRYVPROM" 16 March 1971 7052/ 71 Headings E1F and E1H A method of erecting a rock-fill structure, e.g. a dam 1, by blasting a rock massif 2 comprises locating rows of explosive charges ql, q2 within the massif parallel to the surface of the latter, the power factors or blast effects of charges q2 being greater than those of charges ql, and sequentially firing the rows of charges beginning with the charges qSP1/SP, the charges q2 being fired at the moment when the rock destroyed by the explosive forces of the charges ql starts to move. There may be more than two rows of charges each further row being fired at the moment when the rock destroyed by the explosive forces of the preceding row starts to move. The method may be used to erect cofferdams, dikes, piers, berths, in the mining industry to form a mound of blasted rock mass with a definite configuration, and in road construction to erect various kinds of fills and dikes in building a road bed.