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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.
Construction crews are working around the clock to repair the ginormous hole along I-80 near Exit 40 in Wharton that caused massive traffic delays a day after Christmas.
A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...
Flooded shaft in Ecton Mine, UK. Mining operations can occur over a long period of time, from several years to several decades, and in order to keep the mining operations running, water has to be removed from the mine as it accumulates. [1]
"Normally a mine shaft when it is closed down is filled firstly with rubble," the spokesperson added. "It is then injected with cement to form a plug and then a concrete slab is placed on top ...
For mine construction, an engine shaft is a mine shaft used for the purpose of pumping, irrespective of the prime mover. See also. Outline of mining; References
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.
A brattice is a partition used in mining.It is built between columns of a sub-surface mine to direct air for ventilation. [1] Where the mine is sunk at the base of a single shaft, the shaft is divided into two parts by a wooden or metal brattice.