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Abandoned mine shafts in Marl, Germany 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]
Headframe of the #1 Shaft at Oyuu Tolgoi. A steel headframe is less expensive than a concrete headframe; the tallest steel headframe measures 87 m. [4] Steel headframes are more adaptable to modifications (making any construction errors easier to remedy), and are considerably lighter, requiring less substantial foundations.
Cart from 16th century, found in Transylvania A dumper minecart used in the Basque Country, currently at the Minery Museum.. A minecart, mine cart, or mine car (or more rarely mine trolley or mine hutch) is a type of rolling stock found on a mine railway, used for transporting ore and materials procured in the process of traditional mining.
The Magny shaft under construction, with the wooden headframe of the ventilation shaft and a second (temporary) chimney. Between 1856 and 1859, the Société civile des houillères de Ronchamp drilled the Pré de la Cloche borehole to the north of the future Magny shaft, revealing a layer 1.20 meters thick at a depth of 650 meters.
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 ...
Schematic of underground mine ventilation 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.
This also increased the cost of the whole project (including sinking the mineshafts) from £3.6 billion to £4.2 billion. [47] The increase in diameter has also led to a slower progress rate than before; the TBMs tunnelling would be reduced from covering 66 feet (20 m) to 56 feet (17 m) per day. [48]
Brattice, from the French bretèche, originally referred to part of a castle.This was a small wooden structure, sometimes temporary, that projected out beyond the main part of a castle wall, so as to give flanking fire along that wall whilst still offering some degree of protection.