UndergroundPerformance of Dry-Mix Shotcrete in Permafrost Environment
Jean-Francois Dufour
Read MoreIn order to achjeve the objective. it was imporÂtant to develop a mix lhat would rapidly generate a high heac of hydration. The cold ambient air would cool down 1he shotcrete but the heat released durÂing the hydration process would allow 1he hydraÂtion of ccmem
UndergroundMaking Dry-Mix Shotcrete Go the Distance Underground
Joe Duro
Read MoreDry-mix shotcrete as a means of grouad support for lunnels and mining drifls is fasl, eflicient, and very safe when properly applied. lls effecliveness is unmatched: I can remember lining unstable clay mining tunnels (drifts) using a layer of shotcrete, wire mesh, and another layer
UndergroundShotcrete: A Key to Advances in Safety and Productivity in Mining
J. Denis P. O'Donnell, Sr.
Read MoreIn 1969, when I bid farewell to work in field exploration, I knew I would miss the outdoors. I wasn’t sure if my love for geological mapping, and my penchant for using geophysical equipment to probe the earth for her riches, would be fulfilled. The
UndergroundShotcrete in North American Underground Mines: Yesterday, Today and Tomorrow
Mike Rispin and John Brooks
Read MoreCarl Akeley began the process of guniting, or what is now known as shotcreting, sometime around 1907. Since shotcreting subsequently found its way into underground 1uining operatio1t.s. ii has unc.lcrgone an evolution through the 20th CenÂtury Lo where we find the process being used today
UndergroundStructuralThe Use of Steel Fiber-Reinforced Shotcrete for the Support of Mine Openings
Marc Vandewalle
Read MoreWhat separates the support of mining openÂings from the support of similar civil engineering structures is the fact that mine openings have to survive large defonnations as a result of changing stress conditions induced by progressive mining. Steel fibers impart to concrete and shotcrete a
UndergroundStructuralSteel Fiber Reinforced Shotcrete, It is time to find out about it.
Mike Ballou
Read MoreIn an age when the building, tunneling, and in some areas, minÂing 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
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
Read MoreA Mining Engineer’s perspective on the Application of Steel Fiber Reinforced Wetcrete as a Support Medium in an Ultra Deep Level Mine.
UndergroundStructuralInternationalSteel Fiber Reinforced Shotcrete Replaces Cast Concrete Lining, World’s Longest Subsea Road Tunnel
Christine J. Hauck and John Peter Holtmon
Read MoreThe 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 FATIMAÂProject, (he road connection from
RepairUndergroundStructuralEvolution of Fiber Reinforced Shotcrete
Dr. Rusty Morgan and R. Here
Read MoreThe concept of reinforcing shotcrete with discrete, disominous steel fibers was developed by the Battelle Research Corporation in the USA in the early 1970s.
UndergroundShotcrete Design and Construction for the Stave Falls Project Power Tunnels
Paul Rapp
Read MoreBC 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