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Showing: 1 to 10 of 5420 matches for "q index"  Page   1   2   3   4   5   6   7   8   9  next TITLE Geometallurgical Modelling û Quo Vadis?  SUMMARY ... size distribution, • bond work index, • SAG power index, • tonnes per hour throughput, • A*b, • RMR rock mass rating/Barton Q index, • Davis tube ... AUTHOR W J Shaw PUBLISHED 2009 TITLE Analysis of Rock Mass Classification Systems for Crown Pillar Design  SUMMARY ... activities. A number of tables which relate the support required to the Q index have been published elsewhere (Barton et aI, 1976). ... AUTHOR Porter I PUBLISHED 1994 TITLE Rock-Masses Characterization for Underground Excavation Purposes  SUMMARY ... Also the values of RQD, RSR and RMR indices were obtained. The Q index of the Barton classification was not obtained from the borings due to the fact the ... PUBLISHED 1987 TITLE The Greymouth Coal Project  SUMMARY ... 0.004 Selenium u2l2 Average 0.94 Boron (uglJ!) Average 120.3 Fluorine (ppm) Average 17.17 Hard2rove Grindability Average 41.6 Protodyakanov Index Average 0.9 ... PUBLISHED 1997 TITLE Panel Caving Experiences and Macrotrench (Macrozanja) ù An Alternative Exploitation Method at the El Teniente Mine, Codelco, Chile  SUMMARY ... There are two systems to classify the rock mass and they are both used indistinctly: Rock Mass Rating (RMR by D Laubscher) and so called ‘Q Index’ from L ... AUTHOR P Tobar PUBLISHED 2000 TITLE Using Rock Mechanics Classification to Reduce Ground Instability in Amethyst Underground Mining  SUMMARY ... Two methods for rock mass classification were used, namely rock mass rating (RMR; Bieniawski, 1973 and 1976) and rock quality index (Q; Barton et al, 1974). ... AUTHOR Zingano A ; Costa J F PUBLISHED 1997 TITLE A New Simulation Algorithm for Ball Mills Conversion Method  SUMMARY ... The work index Wr, specific output q and energy efficiency e describe ore grindability from different aspects separately. From the ... AUTHOR Wencai X PUBLISHED 1993 TITLE Sublevel Cave Drop Down Strategy at Perseverance Mine, Leinster Nickel Operations  SUMMARY ... Rock mass classification The Q-Index (Barton et al, 1974) and RMR (Bieniawski, 1973) rock mass classification schemes have been adopted by the mine as a means ... AUTHOR P A Jenkins ; I W O Jones PUBLISHED 2000 TITLE The Sunburst Trial at Leinster Nickel Operations  SUMMARY ... Q Index values typically ranged between ten to 0.5 for most boreholes but went as low as 0.1 which indicates that there were zones of very poor quality rock ... AUTHOR Meyer T PUBLISHED 1995 TITLE Characterising the Mining Environment for Underground Mass Mining  SUMMARY Page 1. Characterising the Mining Environment for Underground Mass Mining ET Brown 1 and KJ Rosengren 2 ABSTRACT The purposes of ... AUTHOR K J Rosengren PUBLISHED 2000 Showing: 1 to 10 of 5420 matches for "q index"  Page   1   2   3   4   5   6   7   8   9  next Search Again