They are substances or chemical products that react instantly under the action of a primer or any other external stimulus, they must be ignited through detonators for the explosion to occur. The real beginning of the history of explosives can be considered with the discovery of black powder that was used to carry out mechanical work around 1818. It is from this date that substances were derived that gave way to the continuous development of explosives.
The explosives can be divided according to the reaction rate of the explosion in low and high, being the first chemicals that break down quickly but without detonating and second refer to their extremely quickly to decompose and called detonation and these in turn they are subdivided into indiciators, they are sensitive to shock and heat; multipliers, for which their sensitivity is between the initiators and the triggers that comprise the explosives.
And by their chemical nature they are divided into organic, which are activated by an initiator or bait and their handling is safe; inorganic, they are directly explosive and are components of gunpowder and organometallic ones are used as initiators of other explosives, they have a detonating character and a shock or rose is enough for their decomposition. These substances in mining are also used to break, destroy or weaken materials of great hardness, usually rocks. Explosives have become causes of great accidents and deaths in the world.
