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Keywords: creep
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Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-113
... and experimentally examined by involving the bound porewater between clay particles. The long-term deformation of the clay rocks is determined with triaxial creep tests on water-saturated samples at ambient temperature. Reponses of the clay rocks to humidity changes are examined by drying and wetting the samples...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-104
... materials. Seal System salt concrete stability rock salt axial strain investigation waste management programme deformation behaviour MPa Upstream Oil & Gas dopa full-scale demonstration specimen Material Behaviour creep strain rate dilatancy deformation onset stress level...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-130
... is based on elastoplastic strain hardening/softening plasticity and can account for time dependent strength and stiffness, creep and shrinkage. The tensile strength and fracture energy are calibrated with results from bending tests on steel fibre reinforced concrete. The tunnelling example is a NATM tunnel...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-110
... excavation process. Time dependence must be considered essential for the study of deformation and fracturing processes of rock material, especially for those subjected to strong compressive and tensile stresses. In this study creep test is conducted in chromite ore under uniaxial compressive stresses. Rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-002
..., temperature, stress triaxiality, transient creep and salt failure) are analyzed. 1. Introduction The mechanical behavior of salt can be studied at various scales: the scale of crystals, at which dislocations climb, glide and pile up; the scale of grains and the interface between grains, where micro-cracks...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-066
... Abstract Rock mass creep in tunnelling through weak rock masses under high overburden may lead to the potential development of significant convergence. Should this convergence be restrained by a rigid support shell, tunnel loading tends to increase. Although, such increase could be significant...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-102
... Abstract: Many metamorphic and sedimentary soft rocks exhibit significant time de-pendent behavior such as creep and relaxation which affect the stability of rock struc-tures. In the design of a durable structure in soft grounds, the secondary stage of creep is of paramount interest to predict...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-058
.... The laboratory tests have been carried out on assorted types of sedimentary rocks and other simi- lar materials which are used in coal mining, primarily on sandstones and cement-fly ash mixture Tekblend of the company Minova.Tests of rheological properties at a cyclic load were conducted both in creep regime...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-020
... ABSTRACT: The paper focuses on the delayed behaviour of marls induced by a change in stress state and by the effect of water. Seven experiments were conducted in oedometric cells on marl from the Arbus tunnel (France). The samples were subjected to a single loading step (i.e one-stage creep...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-081
... ABSTRACT: An analysis concerning the influence of time-dependent loads on the final lining is carried out using the finite element method. The loading induced by a drop in the bearing capacity of temporary support system and changes in the behaviour of geomaterials caused by swelling or creep...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-047
... Abstract Conventional creep testing requires a large number of samples to enable study of the time-dependent behavior of rocks which makes it a time consuming and inconvenient process. Build-ing models and studying mechanisms is also difficult when there are sample-to-sample variations...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-084
... lining rock own weight tunnel lining tunnel rock creep creep loading surface loading maximal compressive methode shallow tunnel lining dash line multiplier solid line dependence circular tunnel lining Bulychev water head Epure Eurock '96, Barla (ed 1996 Balkema, Rotterdam...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-140
... Reservoir Characterization solution-mined cavern cavern Upstream Oil & Gas temperature increase MPa Completion Installation and Operations equilibrium pressure brine heating creep Hannover thermal expansion lithostatic pressure well head structural geology compressibility...

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