Article

RepairUndergroundStructuralEvolution of Fiber Reinforced Shotcrete

Dr. Rusty Morgan and R. Here

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The concept of reinforcing shotcrete with discrete, disominous steel fibers was developed by the Battelle Research Corporation in the USA in the early 1970s.

Article

UndergroundStructuralInternationalMoab Khotsong Mine, A Mining Engineer’s Perspective on the Application of Steel Fiber Reinforced Wetcrete as a Support Medium in an Ultra Deep Level Mine, Part 1

Jon Buckley

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A Mining Engineer’s perspective on the Application of Steel Fiber Reinforced Wetcrete as a Support Medium in an Ultra Deep Level Mine.

Article

UndergroundShotcrete Design and Construction for the Stave Falls Project Power Tunnels

Paul Rapp

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BC Hydro has recently completed construction of a replacement power plant at Stave Falls, near Mission, British Columbia. Two new power tunnels were constn1cted to carry water from the intake to the new powerhouse. The crown, walls, and invert of the power tunnels were fully

Article

UndergroundStructuralInternationalSteel Fiber Reinforced Shotcrete Replaces Cast Concrete Lining, World’s Longest Subsea Road Tunnel

Christine J. Hauck and John Peter Holtmon

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The Northcape Tunnel in the Artic Circle in Norway was opened for traffic on June 15, 1999. The project is the longest subsea road tunneltunnel (6820 m or22,000 fl) in the world un1il 1999/ 2()0(). TheNorthcapc¢Tunnel is part of 1he FATIMA­Project, (he road connection from

Article

UndergroundStructuralSteel Fiber Reinforced Shotcrete, It is time to find out about it.

Mike Ballou

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In an age when the building, tunneling, and in some areas, min­ing industry, is thriving in North America, we in the shotcrete industry should be looking for ways to increase productivity and save on ever-increasing labor costs. This type of thinking often requires the use

Article

UndergroundEstimating Volume of Shotcrete for Mining Applications

David F. Wood

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Traditionally, there has been a rather ad hoc attitude to­wards technical supervision of mining engineering ground control programs, to the extent that the preparation and enforcement of specifications has not been a major issue. In certain locations, however, the dominant use of con­tracting companies to

Article

UndergroundInternationalShotcrete Applications at Northparkes E26 Mine

Stephen Duffield, B.Sc.

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Shotcrete was used extensively during construction of Northparkes E26 Underground Mine, Australia’s first block cave mine. Applications for the shotcrete included ground support, ground control, construction, safety, protection of equipment and remedial repairs. This article details the various uses for the 16,700 m3 (22,000 yd3)

Article

UndergroundInternationalShotcrete for Underground Support in Brazil

Pedro Boscov

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Shotcrete has been used in Brazil since the 1950s, mainly in minor works of slope stabilization and repairs in concrete structures. It was only in the 1960s that it started to be used in underground work. The Furnas Hydroelectric Project had some sections of its

Article

UndergroundDry, Pre-mixed Shotcrete Supply for Tunnels and Mines

Hugo Armelin, Neil Duke, Jorge Montegu, Luis Contreras

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Tunneling and mining projects use shotcrete primarily as a means of ground support. Immediate application of shotcrete provides stability of the working face, prevent­ing loose rock from initiating movement and thus permit­ting incremental advances of underground openings even in the worst ground conditions (type V

Article

RepairUndergroundRehabilitation of Sanitary and Storm Sewers Using Shotcrete

W.L Snow

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The infrastructure of the United States is crumbling above, below, and around us. A considerable segment of the public and private engineering community is currently engaged in solving a geo­metrically increasing problem with geometrically decreasing funds. The problem is often compounded since maintenance of public