Search for dissertations about: "hard rock"

Showing result 1 - 5 of 78 swedish dissertations containing the words hard rock.

  1. 1. Design fires in underground hard rock mines

    Author : Rickard Hansen; Haukur Ingason; Håkan Frantzich; []
    Keywords : Design fire; underground; hard rock mine; vehicle fire; smoke spread; Energy- and Environmental Engineering; energi- och miljöteknik;

    Abstract : During several decades considerable research activities have been conducted with respect to fires in coal mines, but the research activities with respect to hard rock mines have been limited. As the hard rock mines are getting more complex the need for deeper understanding of fires in underground hard rock mines are getting more in demand. READ MORE

  2. 2. Time dependent material properties of shotcrete for hard rock tunnelling

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Lars Elof Bryne; Anders Ansell; Wolfgang Kusterle; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Shotcrete; rock; granite; bond strength; compressive strength; pullout testing; failure modes; interfacial transition zone; micro structure; ettringite; set accelerator; shrinkage; drains; glass fibres; laboratory testing; tunnels tunnelling;

    Abstract : In this thesis different mechanical properties for shotcrete (sprayed concrete) such as compression strength, bond strength, bending tensile strength, elastic modulus, free and restrained shrinkage as a function of its age was investigated. One of the main issues was to investigate the difference between ordinary cast concrete and shotcrete. READ MORE

  3. 3. Mechanical and Hydromechanical Behaviour of Hard Rock Joints. A laboratory study

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Roger Olsson; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; laboratory shear tests; constant normal stiffness; rock mechanics; hydromechanical behaivour; rock joints; replicas;

    Abstract : As a consequence of rock engineering works, the rock mass will deform due to stress changes. Most deformation occurs in the rock joints, in form of normal and shear strains. These deformations will also change the void geometry and thereby the joint aperture and fluid flow. READ MORE

  4. 4. Rock Mechanical Effects of Cement Grouting in Hard Rock

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Staffan Swedenborg; [2001]

    Abstract : A pre-grouted rock mass is subjected to stress re-distribution as the tunnel excavation progresses. The strength and deformation characteristics of grouted rock joints are therefore of interest in any effort to predict the rock mechanical behavior as well as the failure of sealing in a grouted rock mass. READ MORE

  5. 5. Grouting prediction systems for hard rock : based on active design

    University dissertation from Institutionen för anläggning och miljö

    Author : Thomas Dalmalm; [2001]
    Keywords : ;

    Abstract : .... READ MORE