Sökning: "crystalline rock"

Visar resultat 16 - 20 av 50 avhandlingar innehållade orden crystalline rock.

1. 16. Excavation damage from blasting with emulsion explosives : Quality control and macro fracturing in the remaining rock

   Författare :Henrik Ittner; Håkan Schunnesson; Daniel Johansson; Radoslava Ivanova; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gruv- och Berganläggningsteknik; Mining and Rock Engineering;

   Sammanfattning : Excavation damage is usually regulated in Swedish infrastructure tunnel contracts as it can influence the quality and lifecycle cost for tunneling projects. The topic is important for underground constructions with a long operation period such as tunnels for public transport, permanent access tunnels in mines or underground repositories for nuclear waste. LÄS MER

3. 17. Remote Sensing and Gis for Groundwater Assessment in Hard Rock Areas. Applications to Water Well Siting in Ghana and Botswana

   Författare :Per Sander; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; probabilistic approach; GIS; remote sensing; Ghana; hard rock; Botswana; groundwater assessment; lineaments;

   Sammanfattning : Different types of remote sensing data have been evaluated in this thesis with respect to their potential use in groundwater assessment in hard rock areas. The primary objectives of the study have been (1) to evaluate the interpretation of groundwater indicators from high resolution satellite images and aerial photography and (2) to investigate how remote sensing interpretations subsequently can be integrated with other pertinent data, as a decision support in water well siting under difficult hydrogeological conditions. LÄS MER

4. 18. Abundance and fractionation of rare earth elements in calcite and other secondary minerals in fractures in the upper kilometre of crystalline bedrock, SE Sweden

   Författare :Olga M. Maskenskaya; Mats Åström; Kjell Billström; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; secondary minerals; rare earth elements; isotopes; crystalline bedrock;

   Sammanfattning : This thesis focuses on the geochemistry of secondary minerals, mainly calcite but also others such as fluorite and Ca/Al silicates, precipitated throughout the last 1.5 billion years in fractures of crystalline rock, SE Sweden. LÄS MER

5. 19. Rock damage caused by underground excavation and meteorite impacts

   Författare :Ann Bäckström; Robert Zimmerman; John A Hudson; Flavio Lanaro; Pekka Särkkä; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Excavation Damage Zone EDZ ; Fracture analysis; Pre-existing fractures; Class II behaviour; 3D laser scanning; Impact fracturing; Geoengineering; Geoteknik;

   Sammanfattning : The intent of this thesis is to contribute to the understanding of the origin of fractures in rock. The man-made fracturing from engineering activities in crystalline rock as well as the fracturing induced by the natural process of meteorite impacts is studied by means of various characterization methods. LÄS MER

7. 20. Solute transport in fractured rocks : Analysis of analytical solutions and determination of transport parameters

   Författare :Shuo Meng; Longcheng Liu; Ivars Neretnieks; Lanru Jing; Klaus-Peter Kröhn; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fractured rock; Radionuclide transport; Analytical solution; Dispersion mechanisms; Electromigration.; Sprickigt berg; Radionukidtransport; analytisk lösning; Dispersionsmekanismer; Elektromigration.; Chemical Engineering; Kemiteknik;

   Sammanfattning : In order to facilitate the assessment of the safety and function of deep geological repositories for radioactive waste, several models have been developed to describe water flow and transport of solutes in fractured crystalline rock. The rock around the repository is described and modelled as a network of water-bearing fractures. LÄS MER