Sökning: "rock"

Visar resultat 26 - 30 av 715 avhandlingar innehållade ordet rock.

  1. 26. Drip Sealing Grouting of Tunnels in Crystalline Rock: Conceptualisation and Technical Strategies

    Författare :Christian Butron; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; icicle formation; drip sealing; unsaturated flow; rock fracture; dripping.; channels; crystalline rock; design; Grouting; ice growth; evaluation;

    Sammanfattning : A conceptual model of the groundwater hydraulic conditions around the tunnel contour in ancient brittle crystalline rocks has been developed and verified. The general aim has been to reach an understanding of the groundwater conditions in and close to the tunnel roof where dripping takes place and to propose technical and practical strategies for waterproofing. LÄS MER

  3. 27. Fracture mechanics and tribology of rock and rock joints

    Författare :Sun Zongqi; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Sammanfattning : In the first part of the thesis fracture toughness tests of rocks are described. Specimens of Stripa Granite have been tested in three point bending, compact tension and short rod tension. LÄS MER

  4. 28. Quality aspects in direct shear testing of rock joints

    Författare :Jörgen Larsson; Fredrik Johansson; Alejano Leandro; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rock joints; geometrical quality assurance; replicas; direct shear testing; normal stiffness; bergssprickor; geometrisk kvalitetssäkring; replikor; skjuvhållfasthetprovning; normalstyvhet.; Jord- och bergmekanik; Soil and Rock Mechanics;

    Sammanfattning : The stability of rock masses is influenced by the occurrence of rock joints. Therefore, the shear strength of rock joints must be considered in dimensioning of underground constructions. LÄS MER

  5. 29. The rhythm of rock art animals : Picturing reindeer, elk and bear around the seasonal cycle in Stone Age Alta

    Författare :Helena Günther; Fredrik Fahlander; Ingrid Fuglestvedt; Kristin Armstrong Oma; Stockholms universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Rock art; Stone Age hunters; the Arctic; Alta; Northern Fennoscandia; reindeer; elk; bear; traditional contextualised knowledge; human animal relations; human environmental relations; zoo semiotics; ecological community; ethology and animal imagery; arkeologi med inriktning mot allmän arkeologi; Archaeology with General Specialisation;

    Sammanfattning : The Stone Age rock art of Fennoscandia is dominated by pictures of animals. Yet it is its role in the social and cognitive processes within human society that has been the major focus for research. In the thesis, rock art is explored in the lives of people as being part of a larger ecological community. LÄS MER

  7. 30. REAL TIME OPTIMIZATION OF ROCK CRUSHERS

    Författare :Erik Hulthén; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crushing plant; cone crusher; real time optimization; rock crusher;

    Sammanfattning : Cone crushers are used in the mineral, mining, and aggregate industry for fragmentation of rock materials. Cone crusher control systems are widely used for wear compensation and machine protection. These systems ordinarily focus on the crusher and not the crushed products. LÄS MER