Search results
Results from the WOW.Com Content Network
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]
There are two principal phases of underground mining: development mining and production mining. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. There are six steps in development mining: remove previously blasted material (muck out round), scaling (removing any unstable slabs of rock hanging from the roof and ...
It will be a "mammoth task" to identify the bodies brought up from a disused mineshaft in South Africa this week, a police spokesperson says. ... (1.2 miles) underground.
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 ...
STILFONTEIN, South Africa (Reuters) -Desperate relatives of possibly hundreds of illegal miners stuck underground in a disused mine shaft in South Africa waited outside the site on Friday in the ...
Kimberley Mine shaft. The Kimberley Mine or Tim Kuilmine [ 1 ] ( Afrikaans : Groot Gat ) is an open-pit and underground mine in Kimberley, South Africa , and claimed to be the deepest hole excavated by hand, although this claim is disputed by Jagersfontein .
The unexpected discovery of a former mine shaft is unlikely to delay the rebuilding of a Nottinghamshire landmark, a council has said. Brinsley Headstocks is currently being re-erected after it ...
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.