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Keywords: rock support
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Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0368
... the excavation design intent. Recommendations by the engineer enabled the contractor to improve blasting designs, reduce blast damage, and improve the quality of rock support systems. With careful surveillance and instrumentation monitoring the revised excavations were completed without further incident. 1...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-599
... ABSTRACT: As mining and civil tunneling progresses to depth, excavation-induced seismicity and rockburst problems increase and cannot be prevented. As an important line of defense, ground control measures and burst-resistant rock support are used to prevent or minimize damage to excavations...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-174
... the excavation and rock support at risk. This paper describes a typical failure associated with high stress together with the excavation and rock support used. 1. INTRODUCTION Rana Gruber is an iron mine, located about 30 km east of Mo I Rana, owned by Leonard Nilsen & Sons. The mine has been...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-299
... ABSTRACT: This paper presents the results from a 5 year laboratory and in situ investigation into the cause of corrosivity of rock support systems in underground hard rock mines. Long term in situ monitoring of corrosion was complemented by controlled investigations in corrosion chambers...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-148
... by the distance between the two existing tunnels the minimum width of the pillar between the caverns is only 8 m. Typical Norwegian concept of tunnel supporting was used in the rock support design, which means to use shotcrete and rock bolts as the permanent support. The design was based on empirical approach...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-437
... in the coal rock mass. Analyses were conducted for several tunnel shapes and rock support patterns. Results obtained for the distribution of failure zones, and stress and displacement fields around the tunnel were compared to select the best tunnel shape and support pattern to achieve the optimum stability...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-534
... classification is criticized by many rock mechanic experts who say that it lacks input about in-situ stress conditions, but experience shows that it correlates very well with tunneling using drill and blast methodology as well as with rock supports. In jointed rocks with low to medium stress conditions, RMR...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-259
... corrosion Artificial Intelligence Upstream Oil & Gas atmospheric corrosion Hadjigeorgiou Villaescusa corrosion rate rock support reduction coupon 1. INTRODUCTION The design and installation of reinforcement and support systems in underground mines is well advanced. Nevertheless, despite...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-197
... ABSTRACT: Rock burst is one of the greatest challenges to ground control in the mining industry. There are more and more industry requirements on yielding rock support. Since 2008, Jennmar has been conducting large scale research and development works to develop a technically reliable and cost...
Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-904
... power house cavern rock mass Ramamurthy cavern rock support rock mass classification displacement transformer cavern excavation continuum media 1. INTRODUCTION Many uncertainties are involved in determination of rock mass characteristics. Ramamurthy introduced an empirical equivalent media...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0629
... ABSTRACT: The results from an extensive shotcrete failure mapping together with initial adhesion strength tests showed that there were a number of parameters for unreinforced shotcrete as rock support that needed to be further investigated. A more extensive adhesion strength test program...
Proceedings Papers

Paper presented at the Vail Rocks 1999, The 37th U.S. Symposium on Rock Mechanics (USRMS), June 7–9, 1999
Paper Number: ARMA-99-0593
... on investigating the usefulness of preinvestigations to predict actual tunneling conditions, and on studying the effect of the saline environment on rock support materials. More recently, particular emphasis has been placed on evaluating stability and rock cover. Results of this research are described in Dah16...
Proceedings Papers

Paper presented at the The 25th U.S. Symposium on Rock Mechanics (USRMS), June 25–27, 1984
Paper Number: ARMA-84-0841
...) of 9.144 m (30 ft) diameter tunnel and 4,270 m (14,000 ft) of 5.182 m (17 ft) diameter tunnel comprising the Crosstown Interceptor. Construction of the pump chamber is expected to begin late in 1984. This paper will be limited to considerations for the final rock support of the pump chamber opening...
Proceedings Papers

Paper presented at the The 25th U.S. Symposium on Rock Mechanics (USRMS), June 25–27, 1984
Paper Number: ARMA-84-1103
... INTRODUCTION The design of rock support for underground nuclear waste repositories requires consideration of special construction and operation requirements, and of the adverse environmental conditions in which some of the support is placed. While repository layouts resemble mines, design...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-912
... will be constructed. On the original design only benches B and C were planned. All major slopes were to be cut to 1/4 H:l V. Reservoir Characterization Rock mechanics powerhouse stereo plot cross bed shotcrete Upstream Oil & Gas wire mesh rock support hillside wedge failure bedding plane...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-881
... rock support axis tunnel REINFORCEMENT Chairman Jose F.T. Agapito Agapito and Associates Grand Junction, Colorado Co-Chairman Francis S. Kendorski Engineers International Inc. Downer's Grove, Illinois Keynote Speaker Richard E. Goodman University of California Berkeley, California Chapter 89...
Proceedings Papers

Paper presented at the The 8th U.S. Symposium on Rock Mechanics (USRMS), September 15–17, 1966
Paper Number: ARMA-66-0224
... and attention to detail will generally result in the highest possible quality in the final excavation. ROCK REINFORCEMENT VS ROCK SUPPORT The subject of rock reinforcement should be clearly defined and differentiated from rock support. By definition, the rock materials with which we work are generally...

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