Plant for blasting of objects such as rock, concrete, and...

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

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102/10

F42D 3/00 (2006.01) F42D 1/04 (2006.01)

Patent

CA 1084340

ABSTRACT OF THE DISCLOSURE The invention relates to a plant for blasting of ob- jects such as rock, concrete, and the like, where the objects are provided with a number of bore holes containing fuses with blasting caps and explosives such as dynamite, water-gelatine explosives, and the like. The fuse is a low-energy fuse suit- ably consisting of a tube which is coated inside by an explosive or another reactive substance, and the fuse works together with coupling blocks and start-blasting caps. According to the in- vention, each bore hole is provided with a fuse, which in one end is fitted with a blasting cap and in the other end is free, Outside of the bore holes, a number of coupling fuses are ar- ranged, and are fitted either in one end or in both ends with a start-blasting cap with or without time-delay arranged in a coupling unit, for example, in the form of a coupling block made e.g. of plastic. The unit can take one or more fuses in order to transfer to these the initiation when the start-blast- ing cap is initiated. The coupling units are coupled together in the free ends of the fuses in the bore holes and with the free ends to coupling fuses, and a coupling fuse with a free end has this connected to an initiator. This produces an initiating wave through the connected fuse.

275583

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