Explosive, is a reactive substance that contains a great amount of potential energy that
can produce an explosion if released suddenly, usually accompanied by the production of light,
heat, sound, and pressure. An explosive charge is a measured quantity of explosive material.
                 In considering the use of high explosives for destructive purposes, the first requirement is
to using the most effective explosive available. This will govern the selection for the buster with
maximum effect by an acceptable safe means. This will usually mean using the smallest possible
amount of suitable primary explosives. The basic high explosive train consists of the detonator,
booster, and bursting charge. However, high explosive charges are loaded into their containers
by one of three methods-cast-loaded, pre-loaded, or extrusion. Cast loading is preferred by
pouring the substance as a liquid into a container and letting it solidify.
                  Explosives are of immense value in many peaceful pursuits—in mining, quarrying, and
engineering enterprises and in making fireworks, signal lights, and rockets. They are used to project lifelines to ships in distress off storm-beaten shores or to the roofs of burning buildings; to cast oil upon rough seas; and to break up ice jams.




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