What are the types of blasting caps?
- Pyrotechnic fuse blasting cap. The oldest and simplest type of cap, fuse caps are a metal cylinder, closed at one end. ...
- Solid pack electric blasting cap. ...
- Match or fusehead electric blasting cap. ...
- Exploding bridgewire detonator or blasting cap. ...
- Slapper detonator or blasting cap. ...
- Laser ordnance initiators.
A number 8 test blasting cap is one containing two grams of a mixture of eighty percent mercury fulminate and twenty percent potassium chlorate, or a blasting cap of equivalent strength.
Class A explosives.
Possessing, detonating, or otherwise maximum hazard; such as dynamite, nitroglycerin, picric acid, lead azide, fulminate of mercury, black powder, blasting caps, and detonating primers.
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).
explosive, any substance or device that can be made to produce a volume of rapidly expanding gas in an extremely brief period. There are three fundamental types: mechanical, nuclear, and chemical. A mechanical explosive is one that depends on a physical reaction, such as overloading a container with compressed air.
The six controlled blasting techniques that will be discussed are (1) line drilling, (2) trim blasting, (3) buffer blasting, (4) smooth wall blasting, (5) air decking, and (6) presplitting.
The M6 Electric Blasting Cap is used to initiate high explosives with a blasting machine or other suitable source of electric power to detonate all standard military explosives.
C4 was used during the Vietnam War as part of demolition blocks; today, it is commonly used in both military and civilian settings for demolition and flares. C4 is composed of RDX (91%), dioctyl sebacate (5.3%), polyisobutylene (2.1%), and mineral/motor oil (1.6%) [1].
Pentaerythritol tetranitrate (PETN) is the main component in many commercial and military explosives.
8 strength blasting cap (i.e., high explosives are 1. Straight Dynamite - Nitroglycerin in an absorbent, with velocities between 10,000 and 20,000 feet per second. This dynamite is the most sensitive of all commercial explosives. The weight strength is the actual percentage of nitroglycerin in the cartridge.
What is used in blasting?
Ammonium Nitrate Emulsion (also called EP or Emulsion Phase) is ammonium nitrate dissolved in water and suspended in oil. It is an oxidising agent used to manufacture a range of bulk blasting agents. The oil surface gives emulsion based products improved water resistance.
- A. Acetylides of heavy metals. Aluminum containing polymeric propellant. ...
- B. Baratol. Baronol. ...
- C. Calcium nitrate explosive mixture. ...
- D. DATB [diaminotrinitrobenzene] ...
- E. EDDN [ethylene diamine dinitrate] ...
- F. Flash powder. ...
- G. Gelatinized nitrocellolose. ...
- H. Heavy metal azides.
1. âBlasting agentâ means any material or mixture consisting of a fuel and oxidizer, intended for blasting but not otherwise classified as an explosive, in which none of the finished products as mixed and packaged for use or shipment can be detonated by means of a number eight test blasting cap when unconfined. 2.
The first successful one, patented in France in 1908, consisted of a lead tube, about the same diameter as safety fuse, filled with a core of TNT. It was made by filling a large tube with molten TNT that was allowed to solidify.
DYNAMITE - A high explosives used for blasting, consisting essentially of a mixture of, but not limited to, nitroglycerin, nitrocellulose, ammonium nitrate, and carbonaceous materials.
There are two major categories, high explosives and low explosives. High explosives are further divided into initiating, or primary, high explosives and secondary high explosives.
Picric acid is used in the production of explosives, matches, and electric batteries. It is also used in etching copper and manufacturing colored glass, in the leather industry, and in the synthesis of dyes. Picric acid is very unstable and is a flammmable/combustible material.
1 : a sudden and noisy bursting (as of a bomb) : the act of exploding. 2 : a sudden outburst of feeling. explosion. noun. ex·âplo·âsion | \ ik-ËsplĆ-zhÉn \
The blasting of solid rock, ore, or coal; blasting in situ. See Also: secondary blasting.
Controlled blasting involves the use of explosives, carefully set at specific locations in the well bore, to fracture consolidated rock aquifer and incrusting materials. Experience has shown this technique, when done properly, to be useful for temporary well yield improvement.
What is chemical blasting?
How does rock blasting occur? After detonating, chemical energy from the explosive is released, causing the explosive to transform into a glowing gas with large amounts of pressure. In a densely packed hole, this pressure can exceed 1,500,000 psi.
...
RDX.
| Names | |
|---|---|
| Shock sensitivity | Low |
| Friction sensitivity | Low |
| Detonation velocity | 8750 m/s |
| RE factor | 1.60 |
Lead azide (Pb(N ) ) is a common primary explosive used in primers and is of concern due to its lead content [8].
Electric blasting caps can be fired from a 11/2 volt flashlight cell. It would be desirable to increase this voltage requirement to reduce the susceptibility of the cap to be prematurely initiated by extraneous electricity.
C-6 "Flatfire" Plastic Explosive is grey block of plastique, can be detonated by timer, tripwire or signal. The basic blast radius for C-6 is 5m.
Nitroglycerine, discovered in 1846, still remains the most powerful explosive in practical use. Many useful advances have been and are being made, but new explosives are merely new mixtures of old materials, given fancy names.
What is TNT? â TNT is a yellow, odorless solid that does not occur naturally in the environment. It is made by combining toluene with a mixture of nitric and sulfuric acids (ATSDR 1995). â It is a highly explosive, single-ring nitroaromatic compound that is a crystalline solid at room temperature (CRREL 2006).
Low explosives are mixtures of chemicals that burn very rapidly, but subsonically (as opposed to supersonically), meaning that they âdeflagrate.â They consist typically of fuel and an oxidizer. The black powder used in fireworks is one example of a low explosive.
Blasting is commonly used to break materials such as coal, ore, stone, or other mined materials, to demolish buildings, and to excavate foundations for civil structures.
The POWDER FACTOR is a relationship between how much rock is broken and how much explosive is used to break it. It can serve a variety of purposes, such as an indicator of how hard the rock is, or the cost of the explosives needed, or even as a guide to planning a shot.
How do you calculate blasting volume?
- BH + SD. Charge length (C) =
- L - SL. Blast volume (V) =
- B x S x BH x N. Blasted tonnes (T) =
- V x Density of rock in t/m3. Volume of blasthole (Vb) =
- Ï x D2/4000 x L. ...
- PF (kg/m3) = ...
- blasted (for kg/Tonne, divided by blasted tonnes T) ...
- AWS of explosive/AWS of ANFO x 100.
Blasting Caps are designed to have a minimum firing current of 0.25 amps.
8 strength blasting cap (i.e., high explosives are 1. Straight Dynamite - Nitroglycerin in an absorbent, with velocities between 10,000 and 20,000 feet per second. This dynamite is the most sensitive of all commercial explosives. The weight strength is the actual percentage of nitroglycerin in the cartridge.
They also helped to regulate the timing of the explosion and allow time for the miners to leave the area. Black powder fuses are difficult to control, so using blasting caps was a safer way to blast rock. Although blasting caps tried to help improve the safety of miners, they also proved to be quite dangerous.
| torpedo | torp |
|---|---|
| grenade | mine |
| incendiary | charge |
| shot | pineapple |
| ammunition | fireworks |
1. âBlasting agentâ means any material or mixture consisting of a fuel and oxidizer, intended for blasting but not otherwise classified as an explosive, in which none of the finished products as mixed and packaged for use or shipment can be detonated by means of a number eight test blasting cap when unconfined. 2.
Electric blasting caps can be fired from a 11/2 volt flashlight cell. It would be desirable to increase this voltage requirement to reduce the susceptibility of the cap to be prematurely initiated by extraneous electricity.
A blaster shall be qualified, by reason of training, knowledge, or experience, in the field of transporting, storing, handling, and use of explosives, and have a working knowledge of State and local laws and regulations which pertain to explosives.
C4 was used during the Vietnam War as part of demolition blocks; today, it is commonly used in both military and civilian settings for demolition and flares. C4 is composed of RDX (91%), dioctyl sebacate (5.3%), polyisobutylene (2.1%), and mineral/motor oil (1.6%) [1].
The first successful one, patented in France in 1908, consisted of a lead tube, about the same diameter as safety fuse, filled with a core of TNT. It was made by filling a large tube with molten TNT that was allowed to solidify.
What is primary explosive?
A primary explosive is an explosive that is extremely sensitive to stimuli such as impact, friction, heat, static electricity, or electromagnetic radiation. Some primary explosives are also known as contact explosives. A relatively small amount of energy is required for initiation.
