This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Drilling and blasting" – news · newspapers · books · scholar · JSTOR(February 2016) (Learn how and when to remove this message)
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.
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.[1] 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 blasting was the only economical way of excavating long tunnels through hard rock, where digging is not possible. Even today, the method is still used in the construction of tunnels, such as in the construction of the Lötschberg Base Tunnel. The decision whether to construct a tunnel using a TBM or using a drill and blast method includes a number of factors. Tunnel length is a key issue that needs to be addressed because large TBMs for a rock tunnel have a high capital cost, but because they are usually quicker than a drill and blast tunnel the price per metre of tunnel is lower.[2] This means that shorter tunnels tend to be less economical to construct with a TBM and are therefore usually constructed by drill and blast. Managing ground conditions can also have a significant effect on the choice with different methods suited to different hazards in the ground.
^Maurice, William (c. 1910). The Shot-Firer's Guide. London: "The Electrician" Printing and Publishing Company Ltd. pp. 79–80.
^Kolymbas, Dimitrios (2005). Tunelling and tunnel mechanics: a rational approach to tunnelling. Springer-Verlag. pp. 444. ISBN 3-540-25196-0.
and 25 Related for: Drilling and blasting information
Drillingandblasting is the controlled use of explosives and other methods, such as gas pressure blasting pyrotechnics, to break rock for excavation....
role in the blasting process. Following steps are used in the blasting process; 1) Drilling holes – Blast holes are drilled by using drilling machines....
explosives anddrilling; It is one of the world’s leaders in explosives manufacture, storage and distribution and in particular drillingandblasting. It was...
an alternative to drillingandblasting (D&B) methods and "hand mining". TBMs limit the disturbance to the surrounding ground and produce a smooth tunnel...
first kinds of artillery fuse. Slow matches were also used in the drillingandblasting of rock to ignite charges of gunpowder. The slow match attached...
Drilling jumbo or drill jumbo is a rock drilling machine. Drilling jumbos are usually used in underground mining, if mining is done by drillingand blasting...
Small to medium-sized drilling rigs are mobile, such as those used in mineral exploration drilling, blast-hole, water wells and environmental investigations...
construction with the use of drillingandblasting is carried out near the mudflow protection dam of the lake without a working draft and any permits. KChS responded...
using a blasting cap made of a copper percussion cap and mercury fulminate. In 1864, Alfred Nobel filed patents for both the blasting cap and his method...
Geological surveys and design started in 1973, and excavation followed in 1984, tunneling from both ends using drillingandblasting. The tunnel was named...
2022. Jimino, C. Lopez; Jimino, E. Lopez; Carcedo, Ayala (1995). DrillingandBlasting of Rocks. Taylor & Francis. p. 113. ISBN 9789054101994. Retrieved...
diamond drill bit. In reciprocating power drills, the drilling cylinder is mounted on a feed-screw, such that as the hole is drilledand the drilling point...
Darrell W. (1968). "DrillingAndBlasting Techniques For Morrow Point Power Plant". American Institute of Mining, Metallurgical, and Petroleum Engineers...
machine (TBM), anddrillingandblasting techniques are larger versions of subsurface construction. The difference between trenchless and other subsurface...
of nitroglycerin was thus required for the remaining hard-rock drillingandblasting required for the completion of the First transcontinental railroad...
deep hole drilling which can often cause the drill to break. A special coolant is usually used to aid in this type of drilling. Gun drilling was originally...
(1998). Rock Blasting Terms and Symbols: A Dictionary of Symbols and Terms in Rock Blastingand Related Areas like Drilling, Mining and Rock Mechanics...
Major Drilling Group International Inc. is one of the world's largest drilling & mine service companies primarily serving the mining industry.[citation...
and can be created through various techniques, including drillingandblasting, water jet and wedge methods. Limestones are often commercially and historically...
Rail Administration using the drillingandblasting method with one crosscut. During construction there was one blasting accident. Since the tunnel opened...
December 1950, they were only inches out. The tunnel was created using drillingandblasting techniques. The shelters for the workers can be found on Slievenaglogh...
Administration, and Civilian Conservation Corps, and represents one of the most significant Depression-era public projects. Extensive drillingandblasting was required...
Global Information
