Article

RepairUndergroundGeneralUsing Accelerators for Shotcreting

Dan Millette

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Are you shooting overhead and need to build up a 6 in. (154.2 mm) layer in a single pass?

Article

RepairUndergroundStructuralCanada Line Cut and Cover Tunnel Shotcrete Shoring

Roger W. Abbott

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Driving north from the Fraser River on the 4.3 mi (7 km) corridor of Cambie Street, a main artery into downtown Vancouver, one is oblivious to the fact that up to 72 ft (22 m) below the surface is one of the largest shotcrete shoring

Article

RepairUndergroundStructuralInternationalThe Evolution of Rock Support in One Old Mine in Mexico

Raul Bracamontes

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An old mine located in Queretaro State, about a 2-hour drive from Mexico City, now uses wet-mix shotcrete as an integral part of its ground control system.

Article

RepairUndergroundStructuralThe Heartland Corridor Clearance Improvement Project: Vaughan, Roderfield, Laurel, and Gordon Tunnels

2009 Outstanding Underground Project

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As part of a 3-year project, Norfolk Southern Railway, which operates 21,500 mi (34,600 km) of track in 22 eastern states, is expanding 28 tunnels along the Heartland Corridor,

Article

RepairUndergroundStructuralThe Heartland Corridor Clearance Improvement

2008 Outstanding Underground Projec

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With sky-rocketing fuel costs for truck and air transport, moving freight over national railroads has become increasingly attractive to suppliers and manufacturers.

Article

RepairUndergroundInternationalGeneralFiber-Reinforced Shotcrete in the Australian Underground Mining Industry

E. Stefan Bernard

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The majority of underground metalliferous mines in Australia, comprising more than 60 individual mines, now use fiber-reinforced shotcrete (FRS) and bolts as the primary means of ground stabilization.

Article

RepairUndergroundInternationalA History of Shotcrete Use at Vale Inco

John Larsen, Denis Thibodeau, and Joe Hutter

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Vale Inco mining company is a leading producer of nickel, copper, cobalt, and precious metals and has been operating in Sudbury, ON, Canada, located about 240 miles (400 km) north of Toronto, for more than 100 years.

Article

RepairUndergroundStructuralThe MBTA Red Line Emergency Repairs

Outstanding Underground 2007

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The Massachusetts Bay Transportation Authority (MBTA) is the operator of the Red Line Subway in Boston, MA.

Article

UndergroundGeneralFiber-Reinforced Shotcrete for Underground Mines in the New Millennium

Mike Ballou

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Shotcrete mixture designs for underground applications vary from mine to mine throughout North America,

Article

RepairUndergroundStructuralInternationalWestern U.S. and International Water Projects Using Shotcrete

Warren Harrison

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Shotcrete is used for many different hydraulic projects in the arid western part of the U.S.