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Keywords: rockmass
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-005
... comprised cavity formation, blow out, Squeezing, high seepage and very weak rockmass with high rock cover. The mitigation measures adopted to overcome these challenges included fore-poling, umbrella/canopy with channel/joist and chemical/cement grouting etc. After overcoming all these tunnelling challenges...
Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-321
... ABSTRACT: Pseudo-discontinuum numerical models, where discontinuities such as joints are represented discretely in an otherwise intact rockmass (termed "explicit" models in this paper), can demonstrate spatially variable rockmass response with movement along discrete geological structures...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-243
... reservoir characterization rebar rockmass structural geology metals & mining deformation dilation excavation roadway bin wang rockbolt displacement rockburst application wellbore integrity zeyang guo weijun wang borehole bent rockbolt tensile strength stiffness strength ortlepp...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-322
... stability and deformation are quantified. The modeling results show that the impacts of different rockbolt support systems vary slightly depending on the properties of the rockmass being supported. Generally speaking, however, it was found that improvements to support installation pattern and orientation...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-440
... rockmass installation safety instrumentation mesh strength gobbi hoek rock mechanic geometry congresso brasileiro br 116 cnica cobrameg concentration upstream oil & gas formation rastro formation figure 7 shear strength Abstract Since the road BR 116 was build...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-046
... characterization sandstone carter classification mpa assessment rockmass international journal bertuzzi application geological strength index mining science Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza (Eds) © 2020 ISRM, ISBN 978-0-367-42284-4...
Proceedings Papers

Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-210
...A STUDY OF THE GEOMETRICAL SCALE-DEPENDENCY OF FRACTURED ROCKMASSES USING LIDAR SCANNING: THE CASE STUDY OF BROCKVILLE TUNNEL *I. Vazaios, N. Vlachopoulos, M.S. Diederichs Department of Geological Sciences and Geological Engineering, Queen s University 36 Union Street Kingston, Canada K7L 3N6...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-159
... the stress level reaches approximately c/2 in both directions. An empirical biaxial failure is derived from a regression analysis of test results, and a new biaxial failure criterion for the jointed rockmass is proposed in an analogous way to the Hoek-Brown criterion, based on the test result and combining...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-265
... rock masses, obeying for yield the associate flow rule, were examined. The obtained results show the influence of the rockmass quality on the anchor length of the rock bolt and on its behaviour as a means of reinforcement. Subject: Modelling and numerical methods Keywords: bolts and anchors, numerical...
Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-174
... rockmass parabolic section safety factor metals & mining Thickness underground support element application Reservoir Characterization abutment support design definite integral estimate parabolic curve parabola parabolic slice perpendicular support element stope support design 11th...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-266
...Mechanical properties for the rockmass in the central barrier of temporary shiplock in Three Gorges Project Les proprlstes mecaniques du massif rocheux dans la barrlere centrale de recluse temporaire, . dans Ie projet des Trois Gorges '" Mechanische Eigenschaften des Felsuntergrundes im Bereich der...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-309
... monitoring can be used to track the development of zones of high stress concentration in the rockmass. Understanding the complex interaction between an underground operation and the stressed rockmass clearly requires knowledge of the state of stress as a function of location in the crust.Generally, the state...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-066
... of the single most complex design issues in the mining industry. The importance of this aspect is also reflected in the attention given to it in the Health and Safety Act published in 1996. The methodology that is described and proposed in this paper deals with stope support design from a strata or rockmass...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-067
... ABSTRACT: This paper deals with the derivation of relations that characterise the state of stress and displacements in the neighbourhood of a shaft face sunk in an elastic body (rockmass). Having taken into consideration the investigation results presented in the introduction, a general form...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-109
... of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, People's Republic of China . . , ABSTRACf:According to elastoplastic damage deformation mechanism of jointed rockmass, a 3 - 0 elastoplastic damage constitutive model for intermittent multi - joints rockmass under initial damage. damage...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-105
... Reservoir Characterization constitutive relation fracture damage model application stiffness Upstream Oil & Gas rockmass constitutive element rock mass Engineering strain energy plane jointed constitutive element hydraulic fracturing propagation deformation evolution equation...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-239
... Gesten in scismisch-tektonisch aktivem Gebiet gebolirt und instrumentie of werde. Der EinfluB der Eradbeben anf den auflagedruck in der darmter liegenden dicken Scherzone wurde untesucht und fuer signifikant befunelen. 1 INTRODUCTION The underground structures in the rockmass present major design...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-096
... conditions that were marginally stable, or they may generate unstable rock fracturing accompanied by rockmass dilation causing sudden, large ground convergence into mine openings and drifts. They may also cause violent ejection of blocks of rock due to strain energy release or momentum transfer...

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