Cartridge - An individual closed shell, bag, or tube of circular cross section containing explosive material.
Cartridge Count (Stick Count) - The number of cartridges in a standard case. A standard case typically contains about 50 lb. of explosive material.
Cartridge Punch - A wooden, plastic, or non-sparking metallic device used to punch an opening in an explosive cartridge to accept a detonator or a section of detonating cord.
Commercial Explosives - Explosives designed, produced, and used for commercial or industrial applications rather than for military purposes.
Connecting Wire - Wire used to extend the firing line or legwires in an electric blasting circuit.
Continuity Check (Circuit Continuity Check) - A determination made by instrumentation where possible, and visually in all cases, show that an initiation system in continuous and contains no breaks or improper connections that could cause stoppage or failure of the initiation process.
Core Load - The explosive core of detonating cord, expressed as the number of grains of explosive per foot.
Crimp - The folded ends of paper explosive cartridge, the circumferential depression at the open end of a fuse cap or igniter cord connector that serves to secure the fuse; or the circumferential depression in the blasting cap shell that secures a sealing plug or sleeve into electric or nonelectric detonators.
Crimping - The act of securing a fuse cap or igniter cord connector to a section of a safety fuse by compressing the metal shell of the cap against the fuse by means of a cap crimper.
Cushion Blasting - The technique of firing a single row of holes along a neat excavation line to shear the web between the closely drilled holes.
Cutoff - A break in a path of detonation or initiation caused by extraneous interference, such as flyrock or shifting ground.
Decibel - A unit of air overpressure commonly used to measure air blast.
Deflagration - An explosive reaction such as a rapid combustion that moves through an explosive material at a velocity less than the speed of sound in the material.
Delay - A distinct pause of predetermined time between detonation or initiation impulses, to permit the firing of explosive charges separately.
Delay Detonator - An electric or nonelectric detonator used to introduce a predetermined lapse of time between the application of a firing signal and the detonation of the base charge.
Delay Element - The device in a delay detonator that produces the predetermined time lapse between the application of a firing signal and detonation.
Delay Interval - The nominal time between the detonations of delay detonators of adjacent periods in a delay series; the nominal time between successive detonations in a blast.
Delay Series - A series of delay detonators designed to satisfy specific blasting requirements. There are basically two types of delay series: millisecond (MS) with delay intervals on the order of milliseconds, and long period (LP) with delay times on the order of seconds.
Delay Tag - A tag, band, or marker on a delay detonator that denotes the delay series, delay period, and /or delay time of the detonator.
Delay Time - The lapse of time between the application of a firing signal and the detonation of the base charge of a delay detonator.
Density - The mass of an explosive per unit of volume, usually expressed in grams per cubic centimeter or pounds per cubic foot.
Detonating Cord - A flexible cord containing a center core of high explosive and used to initiate other explosives.
Detonating Cord MS Connectors - Nonelectric, short-interval (millisecond) delay devices for use in delaying blasts that are initiated by detonating cord.
Detonating Cord Trunkline - The line of detonating cord that is used to connect and initiate other lines of detonating cord. Detonating cord trunkline must be buried.
Detonating Primer - A name applied for transportation purposes to a device consisting of a detonator and an additional charge of explosives, assembled as a unit.
Detonation - An explosive reaction that moves through an explosive material at a velocity greater than the speed of sound in the material.
Detonation Velocity - The velocity at which a detonation progresses through an explosive.
Detonator - Any device containing any initiating or primary explosive that is used for initiating detonation. A detonator may not contain more than 10 grams of total explosives by weight, excluding ignition or delay charges. The term includes, but is not limited to, electric blasting caps of instantaneous and delay types, blasting caps or use with safety fuses, detonating cord delay connectors, and nonelectric instantaneous and delay blasting caps that use detonating cord, shock tube, or any other replacement for electric legwires.
Electric Blasting Circuit - An electric circuit containing electric detonators and associated wiring.
Electric Detonator - A detonator designed for, and capable of, initiation by means of an electric current.
Emulsion - An explosive material containing substantial amounts of oxidizers dissolved in water droplets, surrounded by an immiscible fuel.
Energy - A measure of the potential for the explosive to do work.
Explode - To react chemically to a rapid manner to produce heat and pressure. The term encompasses both deflagration and detonation.
Explosion - A chemical reaction involving an extremely rapid expansion of gases, usually with the liberation of heat.
Explosive - Any chemical compound, mixture, or device, the primary or common purpose of which is to function by explosion.
Explosive Materials - These include explosives, blasting agents, and detonators. The term includes, but is not limited to, dynamite and other high explosives; slurries, emulsions, and water gels; black powder and pellet powder; initiating explosives; detonators (blasting caps); safety fuse; squibs; detonating cord; igniter cord; and igniters.
Explosive Strength - The amount of energy released by an explosive upon detonation that is an indication of the capacity of the explosive to do work.
Extraneous Electricity - Electrical energy, other than actual firing current or the test current from a blasting galvanometer, that is present at a blast site and that could enter an electric blasting circuit. It includes stray current, static electricity, RF (electro-magnetic) waves, and time-varying electric and magnetic fields
Fire-Resistant - Construction designed to offer reasonable protection against fire.
Firing Current - An electric current of recommended magnitude and duration to sufficiently energize an electric detonator or a circuit of electric detonators.
Firing Line - The wire(s) connecting the electrical power source with the electric blasting circuit.
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