Stress and Texture Investigations by Means of Neutron Diffraction

Opening Remarks

Ove StephanssonSeismic Hazard and Stress Field

GFZ German Research Centre for GeosciencesPotsdam

Characterization of an Area, Site for a Rock Engineering Project

Produce a 3-D model of the site and target area• Topography• Soil cover• Rock mass lithology• Structural geology• Hydrogeology• Geochemistry• Thermal properties• Rock mechanics • Rock stress

Methodology forDevelopment of theFinal Rock Stress Model – FRSM of a Site and an Area

After Zang & Stephansson 2010

World Stress Map of Europe, Edition 2008

http://dc-app3-14.gfz-potsdam.de/

After World Stress Map (2008)

Stress Decoupling in Eastern Part of North German Basin

After Zang & Stephansson 2010

Methodology forDevelopment of theFinal Rock Stress Model – FRSM of a Site and an Area

After Zang & Stephansson 2010

Hydraulic fracturing equipmentof type Mesey

Courtesy by F Rummel

Numerical stress modelling with distinct element code 3DEC for deep geological disposal of spent nuclear fuel at Forsmark, Sweden

Angle-dispersive Neutron Diffraction

Problems in Rock Stress Measurements where Neutron Diffraction can Contribute

• Rock anisotropy• Heterogeneity• Discontinuities e.g. microcracks• Residual stresses• Paleostresses• Kaiser effect• Volume effects• Influence of fluids

The ConferenceStress and Texture Investigations by

Means of Neutron Diffraction, STI2011

Organized by GFZ, Potsdam and JINR

Is open

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