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Showing: 1 to 10 of 31 matches for "barton grimstad"  Page   1   2   3   4 TITLE Are Long TBM Tunnels Faster by TBM?  SUMMARY ... ventilation delay, mucking, bolting, shotcreting) and advance per round are each strongly linked to the Q-value (Barton et al., 1974, Grimstad and Barton, 1993 ... AUTHOR Barton, Nick PUBLISHED 2001 TITLE Ground Support Methodology Employing Shotcrete For Underground Mines  SUMMARY ... crusher chambers and maintenance shops) support correspond to an “Excavation Support Ratio” (ESR) of 3 and 0.6 - 1.3, respectively (Grimstad and Barton,1993 ... AUTHOR Pakalnis, R. PUBLISHED 2010 TITLE Initial Stability Study Of Large Openings For The National Underground Science Laboratory At The Homestake Mine, Lead, Sd  SUMMARY ... 3) and Grimstad and Barton [4] (fig.4), the recommended support for all three sites agreed well with the support used at these sites (table 1), indicating that ... AUTHOR Tesarik, Doug PUBLISHED 2002 TITLE Application of modified Hoek-Brown transition relationships for assessing strength and post yield behaviour at both ends of the rock competence scale - Synopsis  SUMMARY ... shear strength rather than by material strength, the empirical Q-system and Mathews-Potvin type support design charts (Grimstad and Barton, 1993, Potvin et ... AUTHOR Carter, T. G. PUBLISHED 2008 TITLE Use of Tunnel Boring Machines at Depth: Extending the Limits  SUMMARY ... relatively high intact strengths (>150 MPa typically), and with only limited joint- ing (s > 0.1, Q > 10 approximately [Barton, 1976; Grimstad and Barton, 1995 ... AUTHOR Downing, Bruce ; Carter, Trevor ; Beddoes, Richard ; Moss, Allan ; Dowden, Peter PUBLISHED 2007 TITLE Rock Mass Characterization For Excavations In Mining And Civil Engineering  SUMMARY ... the advancing mining front might follow the changes sug- gested by Grimstad and Barton [1993] for the case of mining drifts in massive rock surrounding an ore ... AUTHOR Barton, Nick, PH.D. PUBLISHED 2007 TITLE Comparison of different systems for rock mass characterisation and lessons from the Äspö Test Case, Sweden  SUMMARY ... system is the Tunnelling Quality Index (Q) based on a large amount of case histories of underground excavation in hard rock (Grimstad & Barton, 1993). ... AUTHOR Lanaro, F. ; Röshoff, K. ; Jing, L. ; Christiansson, R. PUBLISHED 2003 TITLE New York Subway Stations And Crossover Caverns—Update On Initial Support Design  SUMMARY ... The four differing design approaches that were used to verify and optimize the IGSR chart are as follows: Empirical methods (Q, [Barton & Grimstad 2004], RMR ... AUTHOR Desai, Dru ; Lagger, Hannes, ; Stone, Charles PUBLISHED 2007 TITLE Application Of The Q-System To Australian Underground Metal Mines  SUMMARY ... concluded that significantly more support was being used than is recommended by the Q-system tunnel reinforcement design chart (after Grimstad and Barton [1993 ... AUTHOR Peck, Warren A. ; Lee, Max F. PUBLISHED 2007 TITLE Potential Development of the Underground Science City in Rock Caverns at Kent Ridge in Singapore  SUMMARY ... support requirements have been assessed using the method developed by the Norwegian Geotechnical Institute (Barton, Lien, Lunde, 1974; Grimstad and Barton, 1993 ... AUTHOR Nelson, C. ; Petersen, L. ; Carmody, J. ; Pound, C. ; Zhao, J. ; Cai, J. G. ; Lee, K. W. PUBLISHED 2001 Showing: 1 to 10 of 31 matches for "barton grimstad"  Page   1   2   3   4 Search Again