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Shaft sinking. A plan-view schematic of a mine shaft showing cage and skip compartments. Services may be housed in either of the four open compartments. Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. [1] Shallow shafts, typically sunk for civil ...
Advances in medieval mining and metallurgy enabled the flourishing of Western European civilization. Accessible ores and improved extraction techniques supported economic growth and trade. Innovations like water-powered machinery and better smelting methods increased the productivity and quality of metals. Metallurgical activities were also ...
Minecraft. modding. A Minecraft mod is a mod that changes aspects of the sandbox game Minecraft. Minecraft mods can add additional content to the game, make tweaks to specific features, and optimize performance. Thousands of mods for the game have been created, with some mods even generating an income for their authors.
The mineshafts and their surrounding remains are important in demonstrating the development of the mining industry in Queensland. They reflect the immense gold mining activity that occurred in Charters Towers from 1872 to 1917, which saw it become the second largest city in Queensland during this time period and the third largest gold field in ...
This list of deepest mines includes operational and non-operational mines that are at least 2,212 m (7,257 ft), which is the depth of Veryovkina Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
The mine ventilation fan, before 1908. Underground mine ventilation provides a flow of air to the underground workers of a mine with sufficient volume to dilute and remove dust and noxious gases (typically NO x, SO 2, methane, CO 2 and CO) and to regulate temperature. The source of these gases are equipment that runs on diesel engines, blasting ...
Mods and rockers. Mods and rockers were two conflicting British youth subcultures of the late 1950s to mid 1960s. Media coverage of the two groups fighting in 1964 sparked a moral panic about British youth, and they became widely perceived as violent, unruly troublemakers. The rocker subculture was centred on motorcycling.
Adding 4 hours to 9 o'clock gives 1 o'clock, since 13 is congruent to 1 modulo 12. In mathematics, modular arithmetic is a system of arithmetic for integers, where numbers "wrap around" when reaching a certain value, called the modulus. The modern approach to modular arithmetic was developed by Carl Friedrich Gauss in his book Disquisitiones ...