rock or coal blasting

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• coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …   Universalium

• Coal mining in Kentucky — Coal was discovered in Kentucky in 1750. Since the first commercial coal mine opened in 1820 coal has gained both economic importance and controversy regarding its environmental consequences. As of 2010 there are 442 operating coal mines in the… …   Wikipedia

• blasting —       process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include (1) drilling holes, (2) placing a charge and detonator (blasting cap) in each hole, (3) detonating the charge, and… …   Universalium

• blasting powder — noun : black powder usually containing sodium nitrate manufactured in grains or pellets and used especially for blasting soft materials (as in coal mines) called also black blasting powder * * * a form of gunpowder made with sodium nitrate… …   Useful english dictionary

• Underground mining (hard rock) — A three dimensional model of an underground mine with shaft access Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals[1] such as ore containing gold …   Wikipedia

• Environmental effects of coal — There are a number of adverse environmental effects of coal mining and burning.These effects include: * release of carbon dioxide and methane, both of which are greenhouse gases causing climate change and global warming according to the IPCC.… …   Wikipedia

• tunnels and underground excavations — ▪ engineering Introduction        Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …   Universalium

• MBM Engineering College — Mugneeram Bangur Memorial Engineering College, is a technical college at Jai Narain Vyas University in Jodhpur, Rajasthan, India.HistoryOne of the best engineering colleges in India. Engineers produced by this institute are working allover the… …   Wikipedia

• shothole — /shot hohl /, n. a hole drilled in rock, coal, ore, etc., to hold explosives used in blasting. [1870 75; SHOT1 + HOLE] * * * shotˈhole noun 1. A hole made by a shot, or in timber by a boring insect, or in a leaf by a fungus 2. A hole in a wall… …   Useful english dictionary

• Blair, Logan County, West Virginia — Blair is an unincorporated community in Logan County, West Virginia, United States, on the Spruce Fork. Blair lies along West Virginia Route 17. According to the Geographic Names Information System, Blair has also been known as Ginseg, Ginseng,… …   Wikipedia

• mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …   Universalium