What is Nonel in blasting?
Nonel is a shock tube detonator designed to initiate explosions, generally for the purpose of demolition of buildings and for use in the blasting of rock in mines and quarries. Nonel is a contraction of “non electric”.
How Nonel works?
NONEL TD (trunkline delay) detonators are intended to initiate detonating cord or shock tube downlines in various surface blasting applications. When initiated, the shock tube propagates a low energy signal to the detonator at a rate of 6,500 ft/second (2,000 m/sec).
What does Nonel stand for?
NONEL
| Acronym | Definition |
|---|---|
| NONEL | Non-Electric (firing system for explosives) |
| NONEL | No-Observed-Nephrotoxic-Effect Level (toxicology) |
How does an electric detonator 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.
How many pounds of PETN per foot are in detonating cord?
Nonelectric Detonating System (Nonel) – This is a thin plastic shock tube that has a light dusting of reactive powder on the inside surface (approximately one pound per 70,000 feet).
What are the blasting accessories?
Firing accessories
- Blasting machines. These include:
- Nonel Starter. The ExelTM Start DS2 starter is a new-generation electronic firing device for firing non-electric detonators.
- Ohmmetre.
- Electronic firing system.
- Connecting wires.
- Multimeter.
- Sheath.
- Expanding cement.
How is blasting powder factor calculated?
Powder Factor = Tons of rock (or cubic yards) per pounds of explosive. From Powder Factor of 1 lb./c.y. 9. Adjust to a rectangular pattern of the same total cubic yards.
What is powder factor in blasting?
The POWDER FACTOR is a relationship between how much rock is broken and how much explosive is used to break it. Powder factor can be expressed as a quantity of rock broken by a unit weight of explosives. Or, alternatively, it can be the amount of explosives required to break a unit measure of rock.
What does a blasting cap do?
Blasting caps are used to detonate an explosive charge. Blasting caps contain a small explosive charge that in turn sets off a larger attached explosive (such as dynamite).
What are the 3 categories of high explosives?
High explosives are divided into three main categories, Primary (or Initiating) High Explosives, Secondary High Explosives, Boosters and Secondary High Explosives, Main Charge. As with many of the terms associated with explosions, there is also other terms that describe combustion explosions, “Deflagration Explosion”.
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.
Are blasting caps legal?
No person shall have matches or fire of any kind in any magazine. No person shall store or keep blasting caps, detonating or fulminating caps, or detonators in a magazine in which any other type of explosive is stored or kept.
