Quarrying with Nitroglycerine

Numéro d’image : 12289529
Quarrying with Nitroglycerine
Blasting holes being drilled in a quarry in the 19th century to be filled with the explosive nitroglycerine which, on detonation, will fracture the rock. Nitroglycerine (glyceryl trinitrate), made from nitric acid and glycerine, was discovered by A. Sobrero in 1846. A highly explosive, shock-sensitive oily liquid, it is extremely dangerous, inconvenient to use, with little practical application. In 1876 the Swedish chemist Alfred Noble found that combining nitroglycerine with adsorbents such as diatomaceous earth (kieselguhr) it became more stable and safe to use. The paste was shaped to go into a suitable tube together with a mercury fulminate detonator and percussion cap. This enabled a safe and reliable means of producing controlled explosions. Nobel named his invention “dynamite” and it has become widely used in the mining, quarrying, construction and demolition industries.
Licence : Droits gérés
Crédit: Science Photo Library / Terry, Sheila
Taille de l’image : 4472 px × 3942 px
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