What is electronic detonators?
Electronic detonators are modern, fully programmable and intelligent high strength detonators. Each detonator contains a circuit board that can be programmed to initiate at precise millisecond timing within a firing sequence.
How do electronic detonators work?
electric detonator – any device containing an initiating or primary explosive that is used for initiating detonation in another explosives material and uses direct electrical energy from the device’s leads (wires, springs, contacts, etc.) to fire an igniter to initiate the device.
What are detonators in explosives?
A detonator, frequently a blasting cap, is a device used to trigger an explosive device. A blasting cap is a small sensitive primary explosive device generally used to detonate a larger, more powerful and less sensitive secondary explosive such as TNT, dynamite, or plastic explosive.
Why electronic detonators are preferred over pyrotechnic delay detonators?
As discussed, the electronic detonators provide more accurate timing than the conventional pyrotechnic detonators which rely on the combustion speed of a pyrotechnic composition. The timing accuracy capability of the electronic detonator allows for: More efficient application of explosive energy.
How many types of detonators are there?
There are three types of detonators according to firing methods : electric detonator, non-electric detonator and electronic detonator ( Figure 4).
What should not be dropped directly onto the primer when loading blast holes?
(b) Rigid cartridges of explosives or blasting agents that are 4 inches (100 millimeters) in diameter or larger shall not be dropped on the primer except where the blasthole contains sufficient depth of water to protect the primer from impact.
Which is a method of secondary blasting?
Two methods of secondary blasting of rock are available. The first, called the plaster or mudcap method, is to fire a charge of explosive placed on the rock and covered with clay, the shock of the detonating explosive breaking the block.