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Rock blasting in Finland. Drilling and blasting is the controlled use of explosives and other methods, such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. The result of rock blasting is often known as a rock cut.
It has higher density and explosive strength than Nitramon. Nitramex was developed for blasting hard rock. [2] This explosive was used in the removal of Ripple Rock. Large quantities of Nitramex 2H (over a thousand tonnes) were packed into tunnels. The explosion, in 1958, was one of the largest non-nuclear explosions in history. [citation needed]
Unlike other compound explosives, the number before the slash is the mass percentage of TNT and the second number is the mass percentage of PETN.) This 50:50 mixture has a density of 1.65 g/cm 3 and a detonation velocity of 7400 m/s. Pentolite is a common explosive for cast boosters for the blasting work (as in mining).
ANFO under most conditions is detonator-insensitive, so it is legally classified as a blasting agent (tertiary explosive) [11] and not a high explosive. [12] Ammonium nitrate is widely used as a fertilizer in the agricultural industry. It is also found in instant cold packs. In many countries, its purchase and use are restricted to buyers who ...
This is a typical "default" rating for connecting charges for blasting; lighter detonating cords may be used for "low noise blasting" and movie special effects, while heavier cords, used where the cord is employed to have some direct explosive effect—such as for precision rock carving work—may use 50 to 250 grain/foot (10 to 50 g/m ...
Binary explosives are cap-sensitive (detonatable with a standard #8 blasting cap) two-part explosives mixtures, shipped separately and combined at the use site. Many of these mixtures are based on Ammonium nitrate as an oxidizer plus a volatile fuel, but unlike ANFO (ammonium nitrate fuel oil explosive) these binaries can be detonated by ...
The homeowners filed a breach-of-contract lawsuit, arguing the damage was caused by vibrations from blasting at the rock quarry. Court: Insurer must cover rock-mining blasting damage to Miami-Dade ...
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.