Drilling And Blasting
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. 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. For instance, an early 20th-century blasting manual compared the effects of black powder to that of a wedge, and dynamite to that of a hammer. The most commonly used explosives in mining today are ANFO based blends due to lower cost than dynamite. Before the advent of tunnel boring machines (TBMs), drilling and bl ...
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Blasting Honkanummi 4-6
Blasting may refer to: * Abrasive blasting * Blast furnace * Rock blasting See also * Blast (other) * Blaster (other) Blaster may refer to: Arts and entertainment Fictional entities * Blaster (''Star Wars''), a gun * Blaster (''Transformers''), an autobot * Blaster (''G.I. Joe''), a character * Blaster (''Gobots''), a Guardian Gobot * Blaster, a character ...