UndergroundShotcrete for Ground Support: Current Practices in Western Canada
Cesar Chan, Roland Here, and Dudley R. Morgan
Read MoreEach ground-support project is unique and will likely have its own design and performance re-quirements. Performance requirements for shotcrete can generally be divided into two groups: fresh state parameters and hardened state parameters. The following briefly elaborates on the variables included in each of these
UndergroundStructuralDetermination of Early-Age Compressive Strength of Shotcrete
Roland Here and Dudley R. Morgan
Read MoreTere has long been a need for a reliable, simple-to-use means of determining the early-age rate of strength gain in shotcrete.During approximately the first 24 hours after shotcrete has been placed, its compressive strength is typically too low to measure using standard core-extraction and testing
UndergroundStructuralDesign Guidelines for the Use of FIber-Reinforced Shotcrete in Ground Support
F. Papworth
Read MoreDevelopments in Shotcrete in Hobart, Tasmania, Australia in April 2001. One of the outstanding papers presented at the Conference was a paper by Grant, Ratcliffe and Papworth on œDesign Guidelines for the use of SFRS in Ground Support. Frank Papworth was asked to submit an
UndergroundStructuralInternationalShotcrete for Underground Support
Dr. Rusty Morgan
Read MoreIn November 1999 I had the opportunity to attend the Third International Symposium on Sprayed Concrete for Underground Support.
UndergroundStructuralInternationalShotcrete Red Hot in Peru
Hugo Armelin and Denis Blais
Read MoreAn1amina copper mine is a Sl.2 btltion projcc1 in lhe Andes Mountailh of Peru. The projeci. owned by Canadian mining gi3111S Norandll. J’cck and Rio Afgom, i.s one of the. single largest mining inveso:nents in 1be Americ:iô€€£ at this moment and oomprises the cons1ruction of
UndergroundMoab Khotsong Mine, Part 2
Jon Buckley
Read MoreHaving discussed the basics for the successful application of SFR wctcrete, the issue of its quality maintenance needs to be addressed. There are a numÂber of critical indicators that the placed product has to meet.
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