Air Blast - the airborne shock wave or acoustic transient generated by an explosion.
Ammonium Nitrate - The ammonium salt of nitric acid represented by the NH4NO3.
ANFO - An explosive material ideally consisting of 94% ammonium nitrate and 6% fuel oil by weight. ANFO is used as a blasting agent.
Artificial Barricade - An artificial mound or reverted wall of earth of a minimum thickness of 3 ft.
Back Break - Rock broken beyond the limits of the rear row of holes in a blast pattern.
Barricaded - The effective screening of a building containing explosives from a magazine or other building, railway, or highway by a natural or an artificial barrier. A straight line from the top of any sidewall of the building containing explosives to the eave line of any magazine or other building or to a point 12 ft above the center of a railway or highway shall pass through such barrier.
Base Charge - The main explosive charge in the base of a detonator.
Bench - The horizontal ledge in an excavation or mining operation along which holes are drilled vertically.
Binary Explosive - An explosive prepared by mixing 2 non-explosive materials which when combined form a cap-sensitive explosive
Blast - The action of breaking and displacing rock by means of explosives. SHOT also means blast.
Blast Area - The area of a blast within the influence of flying rock missiles, gases, and concussion.
Blast Site - The immediate area where the blast holes are located and explosive materials are handled during loading of the shot.
Blaster - That licensed, qualified person in charge of, and responsible for the loading and firing of a blast.
Blasting Agent - A material or mixture consisting of a fuel and oxidizer used for blasting, but not classified as a high explosive, in which none of the ingredients are classified as an explosive. The finished product is not cap-sensitive.
Blasting Cap - (see detonators) - A metallic tube closed at one end, containing a charge of one or more detonating compounds, and designed to initiate detonation.
Blasting Galvanometer - An electrical resistance instrument designed specifically for testing electric detonators and circuits containing them. Along with blasting ohmmeters and blaster's multimeters, it is used to measure resistance or to check electrical continuity.
Blast Hole - A hole drilled in rock or other material for the placement of explosive.
Blasting Machine - An electrical or electromechanical device that provides electrical energy for the purpose of energizing detonators in an electric blasting circuit.
Blasting Vibration - The energy from a blast that manifests itself in airborne and earth borne vibrations that are transmitted through the earth and atmosphere away from the immediate blast site.
Blend - A mixture consisting of (a) A water-based explosive material matrix and ammonium nitrate or ANFO; or (b) A water-based oxidizer matrix and ammonium nitrate or ANFO.
Booster - An explosive charge, usually of high strength and high detonation velocity, used to improve the initiation of less sensitive explosive materials.
Bridge wire - A resistance wire connecting the ends of the legwires inside an electric detonator and which is imbedded in the ignition charge of the detonator..
Burden - The distance in feet from an explosive charge, in the direction of relief, to the nearest free or open face.
Bus Wire - Expendable heavy-gauge bare copper wire used detonators or series of detonators in parallel.
Cap Crimper - A mechanical device for crimping the metallic shell of a fuse detonator or igniter cord connector securely to a section of inserted safety fuse. A mechanical device for crimping the metallic shell of detonator.
Cap Sensitivity - An explosive material is considered to e cap sensitive if it detonates with an IME No. 8 Test Detonator.
Capacitor-Discharge Blasting Machine - A blasting machine in which electrical energy, stored on a capacitor, is discharged into a blasting circuit containing electric detonators.
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