Search results
Results from the WOW.Com Content Network
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 engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects.
Sinking a dry shaft means that any water that flows into the excavation is pumped out to leave no significant standing or flowing water in the base of the shaft. When wet sinking a shaft the shaft is allowed to flood and the muck is excavated out of the base of the shaft underwater using a grab on the end of a crane or similar excavation method.
William Coulson (1791-1865) was a mining engineer and master shaft sinker who was responsible for sinking more than 80 mine shafts in North East England along with others in Prussia and Austria. He was also notable for leading the rescue and recovery team after the Hartley Colliery disaster of 1862.
The bank, pit bank or pit brow is the area at the top of the shaft. [3] Banksman or banker. A banksman, banker, hillman or browman works at the pit bank to dispatch the coals, and organise the workforce. He is in charge of loading or unloading the cage, drawing full tubs from the cages and replacing them with empty ones. [1]
When an element of mass is offset from the axis of rotation, centrifugal force will tend to pull the mass outward. The elastic properties of the shaft will act to restore the “straightness”. If the frequency of rotation is equal to one of the resonant frequencies of the shaft, whirling will occur. In order to save the machine from failure ...
The shafts of the three concessions established in the mid-19th century. The Ronchamp colliery shafts (French, Les puits des houillères de Ronchamp) are a series of collieries undertaken by the various mining companies in the Ronchamp coalfield between the early 19th and mid-20th centuries at Ronchamp, Champagney, and Magny-Danigon, in the Haute-Saône département of France.
In mining, it offers a range of automation technology including underground vehicles, conveyor belts and monitoring systems, and shaft-drilling equipment. [26] In the energy industry, it provides equipment for oil and gas pipelines, fossil fuel exploration, geothermal energy development and electricity tunnels. [ 27 ]
But the last shafts dug around 1830, found no coal. Shaft no. 5, continued by drilling, found no trace of coal, and shaft no. 6 stumbled on an uplift in the coalfield linked to a fault. In 1839, shaft no. 7 was sunk in search of coal. However, with the company bankrupt, the concession was put up for sale and the sinking stopped.