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1868 advertisement in a mining newspaper for the California Powder Works California Powder Works was the first American explosive powder manufacturing company west of the Rocky Mountains . When the outbreak of the Civil War cut off supplies of gunpowder to California 's mining and road-building industries, a local manufacturer was needed.
The Pacific High Explosives Company was incorporated in California on 25 April 1906, and built a plant at Roberts Landing in San Leandro, California to manufacture Trojan powder. [2] This was the only western plant of the New York-based Trojan Powder Company. [6]
For mixtures and types of explosives, see Category:Explosives Subcategories. This category has the following 6 subcategories, out of 6 total. ... This list may not ...
In 1892, [11] the Giant Powder Company moved once again, this time to Sobrante near Point Pinole, northwest of San Pablo (Sobrante should not be confused with nearby El Sobrante, California). The company town of Giant, Richmond, California was established by 1895. [12] In 1904, two men were killed in an explosion at the plant. [13] [14]
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Tertiary explosives, also called blasting agents, are so insensitive to shock that they cannot be reliably detonated by practical quantities of primary explosive, and instead require an intermediate explosive booster of secondary explosive. These are often used for safety and the typically lower costs of material and handling.
Drilling and blasting currently utilizes many different varieties of explosives with different compositions and performance properties. Higher velocity explosives are used for relatively hard rock in order to shatter and break the rock, while low velocity explosives are used in soft rocks to generate more gas pressure and a greater heaving effect.
Water gel explosives are frequently used as cartridge explosives because they are much easier to load into large casings. With water gel explosives, the slurry material can simply be poured into the casing. Traditional explosives are cast into the casing. This process is laborious and the charge may begin to shrink, creating multiple voids.