Setting of time delays in a sequence of explosive detonations

F - Mech Eng,Light,Heat,Weapons – 42 – D

Patent

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F42D 1/055 (2006.01)

Patent

CA 2303821

An electrically operated rock blasting system for detonating a number of explosive charges (15), each located in a respective one of a series of spaced boreholes (12, 13) formed in a rock mass site, the system comprising: a control station (19) remote from the explosive charges and adapted to sequentially detonate the explosive charges; a data store (20) at the control station for receiving different types of site data, the site data having an influence on the time intervals between successive detonations, one such site data comprising the physical distance (d) separating the boreholes of successively detonated explosive charges; and, a data input device (21) for use by a site operator and having a memory store into which can be entered separate distance data between successive boreholes of the series, such data being convertible into corresponding time interval data to be set at the control station.

L'invention concerne un système d'abattage de roche permettant de faire détoner un certain nombre de charges (15) explosives dont chacune est placée dans un trou (12, 13) de mine respectif faisant partie d'une série de trous de mine espacés formés dans une masse rocheuse. Ce système comprend: une station (19) de commande éloignée des charges explosives et conçue pour amorcer de manière séquentielle les charge explosives, une mémoire (20) de données située dans la station de commande et pouvant recevoir différents types de données relatives au site, ces données de site influençant les intervalles de temps entre les détonations successives, une de ces données de site représentant la distance (d) physique séparant le trous de mine contenant les charges explosives à détonation successive, et un système (21) d'entrée de données utilisé par l'opérateur du site et comprenant une mémoire dans laquelle on peut entrer les différentes données relatives à la distance entre les trous de mine successifs, ces données pouvant être converties en données d'intervalle de temps correspondants réglés à la station de commande.

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