Article

UndergroundDevelopment of a Wet-Mix Shotcrete for a Deep Mine

Dan Millette and Michel Lessard

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In 2002, an economic study and testing determined that application of wet-mix shotcrete by mechanized application methods permitted substantial gains in cost and in production levels.

Article

Underground2006 Outstanding Underground Project: Weehawken Tunnel and Bergenline Avenue Station

Weehawken Tunnel and Bergenline Avenue Station

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The reconstruction of the Weehawken Tunnel for the New Jersey Transit Hudson-Bergen Light Rail System was recently completed.

Article

UndergroundCanada’s North Country

Richard Atkinson and Michael W. Martin

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The Canadian mining industry has been experiencing a renaissance recently and part of this is the discovery of diamond deposits in the Northwest Territories.

Article

UndergroundDetermination of Early-Age Compressive Strength for FRS

Stefan Bernard and Christian Geltinger

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The strength of the concrete matrix at early ages is an important factor in successful ground control using fiber-reinforced shotcrete (FRS).

Article

UndergroundShotcrete Application in SNOLAB

Satish Bhan, Fraser Duncan, Ian Lawson, and Craig McDonald

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The SNOLAB underground science laboratory is situated 6800 ft (2072 m) below ground at the CVRD-Inco Creighton Mine in Sudbury, ON, Canada.

Article

UndergroundExploring the Limits of Shotcrete Loading Capacity at Early Age

Matthew Clements

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The booming world mineral market is introducing a new level of challenges to miners

Article

UndergroundWatertight Permanent Shotcrete Linings in Tunneling and Underground Construction

Knut F. Garshol and Lauro Lacerda

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Sprayed concrete, or shotcrete, as is the accepted term in North America, has become an integral part of many traditional, nonmechanized (that is, drill and blast, roadheader) tunnel excavations.

Article

UndergroundInternationalA Report from the ITA Working Group on Shotcrete Use

Tarcisio Celestino and Atsumu Ishida

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Working Group 12, Shotcrete Use of the International Tunneling and Underground Space Association (ITA) was established in 1989.

Article

RepairUndergroundRepair of the Baltimore Harbor Tunnel

Ted W. Sofis

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The original construction of the Baltimore Habour Tunnel began in 1955 and was completed in 1957.

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UndergroundShotcrete for Wine Storage

Larry Rowland

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What do northern California grapes and shotcrete have in common?