Search for dissertations about: "hard rock"

Showing result 1 - 5 of 69 swedish dissertations containing the words hard rock.

  1. 1. Design fires in underground hard rock mines

    University dissertation from Västerås : Mälardalen University

    Author : Rickard Hansen; Mälardalens högskola.; [2011]
    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; KTH.; [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. Groundwater resources in hard rock coastal terrains Insights into heterogeneity and spatial variability

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Robert Earon; KTH.; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Crystalline Rock; Groundwater Balance; Kinematic porosity; Groundwater Recharge; Water Security; Coastal Aquifer; Mark- och vattenteknik; Land and Water Resources Engineering;

    Abstract : Challenges regarding water security in hard rock coastal regions with limited soil cover are: a seasonal absence of recharge during times of peak residency, heterogeneity and variability of the fracture network, close proximity to saline water sources and spatially inconsistent storage and extraction. In areas where it is not feasible to connect residents to municipal water systems, a better understanding of the resilience of reservoirs is needed. READ MORE

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

    University dissertation from Institutionen för anläggning och miljö

    Author : Thomas Dalmalm; KTH.; [2001]
    Keywords : ;

    Abstract : .... READ MORE

  5. 5. Experimental investigation of steel cables for rock reinforcement in hard rock

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Bengt Stillborg; [1984]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gruv- och Berganläggningsteknik; Mining and Rock Engineering;

    Abstract : This thesis describes a detailed experimental investigation of the mechanical behaviour of fully grouted steel cables used for rock reinforcement in hard rock. An attempt is also made to explain the possible modes of deformation and cable failure, based on observations from the experiments. READ MORE