Blar i Institutt for geovitenskap og petroleum på emneord "VDP::Other geosciences: 469"
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Conceptual models for rock burst and energy transformations in strain burst
(Chapter, 2020)The occurrence of a rock burst event depends on two requisites: the secondary stresses after rock excavation must be beyond the rock strength and there are excessive energy releases from the rock mass in addition to the ... -
Cyclic oedometer swelling tests on rocks from North-Central Luzon, Philippines
(Chapter, 2020)Tunnels passing through swelling rocks are subjected to stability problems as moisture changes affect the material properties of the rocks. The drying out process during construction may cause local contraction stresses ... -
Design of unlined pressure tunnels in Norway – limitations of empirical overburden criteria and significance of in-situ rock stress measurements
(Chapter, 2020)A key requirement for unlined pressure tunnels is confinement, i.e. that the minimum principal stress must exceed the internal water pressure. Failure to meet this requirement can cause hydraulic jacking of the rock mass, ... -
Numerical simulation of pore pressure in rock joints during pressure transient in an unlined hydropower tunnel
(Chapter, 2020)Recent experimental result shows that pressure transients of both short and long time periods; i.e. water hammer and mass oscillation; can travel into the rock mass of an unlined hydropower tunnel through rock joints. It ... -
Performance of a fully grouted GFRP rock bolt under combined pull and shear loading
(Chapter, 2020)Glass Fiber Reinforced Polymer (GFRP) rock bolts is gaining attention, as an alternative to steel bolts, for permanent rock support in civil underground infrastructures like road tunnels. GFRP holds many advantages for ... -
Shale Creep as Leakage Healing Mechanism in CO2 Sequestration
(Journal article; Peer reviewed, 2017)Experiments on shale specimens targeted creep deformation in order to investigate whether this mechanism could be relied upon to close fractures and stop leakage near injection wells. Uniaxial compression tests were conducted ...