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Keywords: quarry
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Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-040
... laboratory testing apparatus mechanism thb Upstream Oil & Gas platen Laboratory Scale roorda quarry horizontal stress vertical load failure mechanism constant vertical load apparatus lateral displacement numerical model lateral load 1. INTRODUCTION Buckling failure (pop-up) is one...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0608
... and the application of sophisticated numerical tools for long-term behaviour prediction. It is therefore critical to determine appropriate geomechanical properties of the host rock. The Cobourg limestone is found near surface in the Bowmanville quarry, which provides access to samples for direct shear and other...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0401
... to minimize excavation costs and risk management for constructed or natural slopes. metals & mining Reservoir Characterization Upstream Oil & Gas field test quarry structural geology trajectory restitution coefficient rock fall reservoir geomechanics rock fall trajectory field test...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-040
... of photogrammetry at the Delabole slate quarry in Cornwall, UK for remotely acquiring key discontinuity parameter data (orientation, intensity and length) and its subsequent use in developing statistically validated discrete fracture network parameters. The 3D distinct element code, 3DEC, is used for the DFN...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-206
... Abstract: Rockfalls are a relevant hazard in quarrying and open-pit mining as well as in roads with rock cuts. The Spanish Association of Aggregate Producers reported that the most common cause of fatalities in their quarries comes from rockfalls. With the aim of having available methods...
Proceedings Papers

Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2013
Paper Number: ARMA-2013-379
... Abstract: In this study, the outcomes of an experimental program on the supporting effect of backfilling on the response and stability of abandoned mines, quarries and karstic caves and its verification in actual backfilling applications are presented. The backfilling materials were granular...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-133
... ABSTRACT: Excavated rock slopes, such as those that result from massive exploitation operations in surface mining, can be subject to periodic rock instability events. These events can take the form of relatively localized instabilities such as rock fall, which are risky for quarry operators...
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-06-1141
... ABSTRACT: Ornamental stone quarrying in the Carrara basin have determined the formation of several underground voids. A methodology, able to asses the stability conditions of the excavation, has been adopted in order to evaluate the safety conditions of both existing structures and forecasted...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0943
... ABSTRACT : Discussed are the engineering geological mapping of the railroad and I-80 walls, and the seepage and stability analyses conducted for the Thornton Quarry high walls. Fracture mapping, using a laser transit, identified major discontinuities in three-dimensions. Numerical analyses...
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-99-0071
... ABSTRACT: A criminal investigation required rapid drawdown of the water in an abandoned quarry. One wall of the quarry is 230 feet high, and the face overhangs with a dip of 65 degrees. This wall presented a potentially unstable condition during rapid drawdown. Failure of this wall would bury...
Proceedings Papers

Paper presented at the The 27th U.S. Symposium on Rock Mechanics (USRMS), June 23–25, 1986
Paper Number: ARMA-86-0471
... rocks and joints. Mapping orientation, frequency of discontinuities and graphical presentation of data. Application of rock mass classification systems. Consideration of calculated values and optimization of the quarry faces for stability. Also to provide the most efficient fragmentation, toe...
Proceedings Papers

Paper presented at the The 26th U.S. Symposium on Rock Mechanics (USRMS), June 26–28, 1985
Paper Number: ARMA-85-0031-1
... assessment of two roadstone quarries in limestone and basalt respectively. The paper concludes with a general discussion on the effectiveness of this method of evaluating the stability of jointed hard rock slopes. 1 INTRODUCTION Instability of hard rock slopes is mainly governed by the open pit geometry...
Proceedings Papers

Paper presented at the The 23rd U.S Symposium on Rock Mechanics (USRMS), August 25–27, 1982
Paper Number: ARMA-82-190
... quarries surrounding Anna, the results of which suggest a complicated regional stress pattern, with changes in the maximum horizontal stress direction from N45ºE to N15ºW. Since such abrupt stress fluctuations are rather atypical in the Midwest and since the reliability of near-surface tests in defining...
Proceedings Papers

Paper presented at the The 22nd U.S. Symposium on Rock Mechanics (USRMS), June 29–July 2, 1981
Paper Number: ARMA-81-0237
... as evaluation of the effects of errors in ms delay initiators on fragmentation (Winzer, 1978; Winzer, et at., t979a), has changed both the technology of initiation of blasting patterns and the patterns themselves. Upstream Oil & Gas blast design Winzer initiator firing time quarry seismograph...
Proceedings Papers

Paper presented at the 20th U.S. Symposium on Rock Mechanics (USRMS), June 4–6, 1979
Paper Number: ARMA-79-0663
... Upstream Oil & Gas Rock mechanics gneiss hydrofracture horizontal stress stress direction granite mount waldo granite quarry stress measurement Haimson Artificial Intelligence site 2 site 1 Maine fracture Magnitude principal stress topography rockburst THE RELATION OF STRESSES...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0320
..., reproducible strain relief measurements of horizontal stress components were successfully made at depths between .5 and 1 meter using a doorstopper-type strain gauge unit overcored with a 5cm diameter core drill. The rocks were flatlying Silurian carbonates exposed on the floors of shallow quarries...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0201
... earlier. These fractures formed at applied stresses that were about 50 to 60 percent of the uniaxial compressive strengths of cylinders and prisms of Chelmsford granite that contain no flaw. Some of the sample geometries used in the experiments are similar to the geometries of large blocks in quarries...
Proceedings Papers

Paper presented at the The 12th U.S. Symposium on Rock Mechanics (USRMS), November 16–18, 1970
Paper Number: ARMA-70-0427
... not conflict with experience. Within recent years the expansion of urban development in proximity to mining and quarrying activities, together with civil engineering earthwork and other activities concerned with urban redevelopment, have brought an increase in the occasions of conflect between the needs...
Proceedings Papers

Paper presented at the The 4th U.S. Symposium on Rock Mechanics (USRMS), March 30–April 1, 1961
Paper Number: ARMA-61-163
... and radial tensile cracking associated with the reflection of the stress pulse at the free surface. Upstream Oil & Gas quarry quarry face Wellbore Design quarry blast free surface particle velocity fly-rock velocity reflection stepwise increase mining engineering series stress pulse...

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