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- Shaft_mining abstract "Shaft mining or shaft sinking refers to the method of excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom.Shaft sinking refers to the general activity, however shallow shafts, typically sunk for civil engineering projects differ greatly in execution method from deep shafts, typically sunk for mining projects. When the top of the excavation is the ground surface, it is referred to as a shaft; when the top of the excavation is underground, it is called a winze or a sub-shaft. Small shafts may be excavated upwards from within an existing mine as long as there is access at the bottom, in which case they are called Raises. A shaft may be either vertical or inclined (between 45 and 90 degrees to the horizontal), although most modern mine shafts are vertical. If access exists at the bottom of the proposed shaft and ground conditions allow then raise boring may be used to excavate the shaft from the bottom up, such shafts are called borehole shafts.Shaft Sinking is one of the most difficult of all development methods: restricted space, gravity, groundwater and specialized procedures make the task quite formidableHistorically mine shaft sinking has been among the most dangerous of all mining occupations and the preserve of mining contractors. Today shaft sinking contractors are concentrated in Canada and South Africa.".
- Shaft_mining thumbnail Auguste_Victoria_mine_shafts,_Marl.jpg?width=300.
- Shaft_mining wikiPageExternalLink www.abandonedmines.net.
- Shaft_mining wikiPageID "1987490".
- Shaft_mining wikiPageRevisionID "593036726".
- Shaft_mining hasPhotoCollection Shaft_mining.
- Shaft_mining subject Category:Mining_engineering.
- Shaft_mining subject Category:Underground_mining.
- Shaft_mining comment "Shaft mining or shaft sinking refers to the method of excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom.Shaft sinking refers to the general activity, however shallow shafts, typically sunk for civil engineering projects differ greatly in execution method from deep shafts, typically sunk for mining projects.".
- Shaft_mining label "Gesloten mijnen".
- Shaft_mining label "Pozo (minería)".
- Shaft_mining label "Schacht (Bergbau)".
- Shaft_mining label "Shaft mining".
- Shaft_mining label "Szyb (górnictwo)".
- Shaft_mining label "Шахтный ствол".
- Shaft_mining sameAs Schacht_(Bergbau).
- Shaft_mining sameAs Pozo_(minería).
- Shaft_mining sameAs Gesloten_mijnen.
- Shaft_mining sameAs Szyb_(górnictwo).
- Shaft_mining sameAs m.06c3wp.
- Shaft_mining sameAs Q556186.
- Shaft_mining sameAs Q556186.
- Shaft_mining wasDerivedFrom Shaft_mining?oldid=593036726.
- Shaft_mining depiction Auguste_Victoria_mine_shafts,_Marl.jpg.
- Shaft_mining isPrimaryTopicOf Shaft_mining.
