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Keywords: soft rock
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-154
... in soft rocks. The dimensions (30 cm × 20 cm × 20 cm) of the model are considered on the basis of all boundary conditions. The engineering properties of the different materials are evaluated experimentally (UCS, elastic modulus and Poisson's ratio) and the Plaster of Paris (PoP) mixed with sand and some...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-145
... Abstract An overburden height of about 1.5 times the tunnel diameter is known to be critical with regard to the stability of an underground excavation. The near-surface zone is usually affected by heavy weathering and represents the border area between hard and soft rock. Due...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-079
...), Biarez (1961), Eftimie (1969) carried out research into soil deformability. Among Russian researchers Bugrov (1993) and Grechko et al. (1976) can be mentioned. Anisotropic deformability is clearly observed in soils and soft rocks having a layer structure. However, in the works of Grechko et al. (1976...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-076
... or Pwave velocities. As result of the study there is a complete geotechnical characterization of the lithotypes involved in Arteara rock avalanche. Those values will support the future modelling of this rock avalanche. Reservoir Characterization laboratory test porosity soft rock Upstream Oil...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-073
... the optimum conditions for excavation, which could reduce the cost of developing new WJ technology. In this study, we focused on the Smoothed Particle Hydrodynamics (SPH) method, which is a type of particle method, for the numerical simulation of WJ excavation of soft rock saturated with water. The main...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-148
...Rock Mechanics in Civil and Environmental Engineering Zhao, Labiouse, Dudt & Mathier (eds) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-58654-2 Influence of the behaviour of soft rocks on cliff evolution A. Evangelista, A. Scotto di Santolo & M. Zimbardo Department of Hydraulic...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-022
... ABSTRACT: One of the main soft rock characteristics are relatively rapid deterioration and degradation of strength when soft rock is exposed to atmospheric agents. In the investigation of strength degradation caused by weathering, wetting-drying process (as a part of weathering) is the factor...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-037
...249 Rock Engineering in Difficult Ground Conditions Soft Rocks and Karst Vrkljan (ed) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-80481-3 Evolution of compaction bands in high porosity soft rock R. Castellanza & R. Nova Dipartimento di Ingegneria Strutturale, Politecnico di Milano...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-125
... Abstract Itacaja dam is a small concrete gravity structure built to supply electrical energy to the city of Itacaja located in northern Brazil. The dam is supported on soft rocks comprised mainly of verti-cally open jointed weathered sandstones. Seepage along the joints, during reservoir...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-076
... Zagreb anchorage excavation internal friction friction angle rnk method Engineering plasticity index Mihalinec soft rock landslide 489 Rock Engineering in Difficult Ground Conditions Soft Rocks and Karst Vrkljan (ed) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-80481-3...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-046
... Abstract One of the main soft (weak, clay-bearing) rocks characteristic is relatively rapid deterioration and degradation of strength when soft rock is exposed to atmospheric agents (i.e. weathering). In the investigation of strength degradation caused with weathering, wetting—drying process...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-077
... shown that single shallow tunnels in soft rock mostly collapse at a critical overburden height of about 1.5 times the tunnel diameter, This paper will investigate the behaviour of soft, homogeneous and isotropic rock around two tunnels under low overburden (rock mass behaviour type; Austrian Society...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-010
... wellbore integrity strength weak rock specimen reservoir geomechanics Upstream Oil & Gas mass behavior laboratory testing Wellbore Design testing procedure boundary condition Reservoir Characterization procedure shear test specimen preparation structural geology soft rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-083
... and concrete grouting to consolidate the weak rock in advance. 3.3 Large de/ormatioll rate In a large depth as bigger than 200 m with soft rocks, the geo-stress quickly increase with depth, together with intensive tectonic compression, the surrounding rocks will occur larger deformation most unfavorably...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-005
... a huge caisson, smaller-scale field tests conducted in boreholes, and laboratory tests using dri lied cores. II' sedimentary soft rocks have undergone no weathering and are fairly uniform, the influence of discontinuities, if any, may not be overly significant. Thus it is justified to regard rock mass...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-182
... ABSTRACT: The essential features of the mechanical behaviour of soft rocks are first presented. It is suggested that strain-hardening plasticity, such as the Cam-clay model for soils, is a convenient framework for the description of such a behaviour. In order to get a better match between...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-043
... Upstream Oil & Gas rock slope resistivity change rock slope site groundwater behaviour soft rock dipole-dipole electric resistivity technique deposit measurement Point Fracture Zone monitoring Groundwater Flow Reservoir Characterization rainfall measurment resistivity...

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