Sinking A Large-Diameter, Concrete-Lined Access Shaft
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Sinking A Large-Diameter, Concrete-Lined Access Shaft Harold D. Roberts Tunnel, Colorado. by United States. Bureau of Mines.

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Published by s.n in S.l .
Written in English


Book details:

Edition Notes

1

SeriesInformation circular (United States. Bureau of Mines) -- 8029
ContributionsBolmer, R.
ID Numbers
Open LibraryOL21736785M

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Get this from a library! Sinking a large-diameter, concrete-lined access shaft: Harold D. Roberts Tunnel, Colorado. [R L Bolmer]. Abstract. Report issued by the U.S. Bureau of Mines discussing sinking and excavation of large-diameter access shafts. As stated in the introduction, "this information circular describes the application of modern methods and equipment in sinking a vertical, foot-deep by foot-diameter, concrete-lined access shaft for the Harold D. Roberts tunnel near Montezuma, Colo." (p. 1).Author: R. L. Bolmer.   Additional chapters/articles from the CIM book Proceedings of 4th International Shaft Design and Construction conference Design and Construction of Deep Shaft Concrete Linings in th Deep Shaft Sinking Mechanisation Developments Engineering Excellence into Large Diameter Drill and Blast S. every m of shaft sinking,” he told IM. “Today, we sink 1,, m shafts without a single loss time injury.” Take Glencore's Nickel Rim South project in Ontario, Canada. The sinking of two concrete lined shafts simultaneously by Cementation –a m diameter ventilation shaft to a depth of 1, m and a m diameter main access.

  From until sixteen deep shafts were sunk in the UK, all concrete lined. Subsequently from up to the present day no deep shafts have been sunk in the UK, a period of 30 years. Developments in the design and construction of deep shaft linings in the UK therefore were predominantly carried out throughout the period – Shaft Sinking Technology: Larger shafts are usually concrete lined.” Shaft development rates are a function of diameter and ground conditions. For 8- to ft-diameter shafts, which is the vast majority of what SDI does, they can complete a to ft shaft in four to six months. Raise bore shaft development requires access to. Concurrently the designer needs to understand the chosen sinking methodologies in conjunction with crewing to determine the number of decks and fix their spacing. Insufficient access to move and line up formwork, set reinforcing rods and pour concrete in the confined spaces of the Galloway is inherently a major risk to be mitigated. Shaft Sinking Technology: The Long and the Short of It Larger shafts are usually concrete lined.” Shaft development rates are a function of diameter and ground conditions. For 8- to ft-diameter shafts, which is the vast majority of what SDI does, they can complete a to ft shaft in four to six months. Raise bore shaft.

  Particularly, the successful development of the raise boring machine ZFY/ achieves large-diameter shaft construction, whilst former raise boring machines can only drill small-diameter raises. The raise boring machine ZFY/ constructed a ventilation shaft 5 m in diameter in a coal mine and drilled a dozen deep shafts m in diameter. It is a m diameter concrete lined shaft that will provide access and ventilation to the orebody located approximately m below surface. The site visit will include a safety orientation, an overview of the shaft design and sinking methodology and a trip underground to see the underground hoisting and headframe arrangement, and the shaft.   SUMP PUMPING Sump pumping during construction of a large diameter shaft in Sherwood Sandstone WELLPOINTS From CIRIA Report C (): Groundwater Control: Design and Practice DEEPWELLS From CIRIA Report C (): Groundwater Control: Design and Practice   There are currently two shafts at Nutrien Allan Potash: the Production Shaft and the Service Shaft, transporting people and material from surface to a depth of 3, ft. The Production Shaft was completed in , with one section of grey cast iron tubbing installed in the Blairmore formation between the and ft Levels.