Non-electric detonators
Non-electric detonators are identical to electrical detonators in terms of the result, meaning that their main charge is 750mg of tan. In these detonators, there is no electrical match head but a material sensitive to spark that comes out of the tube and causes the initiation.
Two-way detonator
This detonator is characterized by having two detonators at the two edges of the tube. The delay detonator, which enters into the drill (1) and a delay detonator on the surface (2).
Detonator no. 1 provides the delay within the drill and detonator no. 2 provides the delay between on detonator and the one following it. Since it is made like a clip, it allows fast and simple connection to the next tube.
Generally, detonator no. 1 has a delay of 500, 350 milliseconds, and detonator no. 2 – 25 milliseconds.
The conventional lengths for these detonators are 4, 7, 12, 21 and 24 meters.
A non-electrical detonator in the drill
This is a single detonator and at the one end of the tube similar to an electric detonator there are between 1-20 delays In multiples of 25 milliseconds. The conventional lengths in the detonator are 5, 9, 15, 21 and 24 meters.
A non-electrical detonator on the surface
This detonator is a single detonator at the end of the extension cord within a pincer, which allows additional delay between one drill and another, between one row to another or between groups of detonators.
The common delays are: 25, 15 and 42 milliseconds and at the lengths of 4, 6, 8, 9 and 12 meters.
Benefits
- The use of double delay within the drill and on the surface allows the receipt of endless delays. This advantage enables to reduce the shock level by reducing the quantity of explosive for the delay.
- Using one type of detonator facilitate the explosion. There is no need to order dozens of detonator types and the division of the area is also simple.
- Line-to-line delay is possible without restriction.
- The connection between the detonators is very simple since it is made by a quick connection with a clip. The connection time of an entire explosion circuit is shortened to one-fifth of the time.
- In terms of safety, the non-electrical detonator has great advantages:
- There is no fear of accidental activation due to high voltage, transmission, inspiration, lightning and thunderstorm, or any other electric source as against an electric detonator.
- In wet weather and damp soil, there is no problem of voltage drain as opposed to an electric detonator that requires insulation.
