Search for dissertations about: "Impact fracturing"
Showing result 1 - 5 of 9 swedish dissertations containing the words Impact fracturing.
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1. Rock damage caused by underground excavation and meteorite impacts
Abstract : 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. READ MORE
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2. Investigation of the correlation of fracture frequency and electric resistivity in impact craters in crystalline rocks
Abstract : Impact craters are formed when a large meteorite or comethits the Earth. At the impact a shock wave is released causingabundant fracturing in the surrounding bedrock. This type offracturing is intense and occurs throughout a very large volume(>100 km3) of the bedrock. READ MORE
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3. Excavation damage from blasting with emulsion explosives : Quality control and macro fracturing in the remaining rock
Abstract : 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. READ MORE
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4. Predominant failure mechanisms at the Kiirunavaara mine footwall
Abstract : The Luossavaara-Kiirunavaara Aktiebolag (LKAB) Kiirunavaara mine is a large scale sub-level caving (SLC) mine in northern Sweden. The use of SLC as a mining method inherently causes significant rock mass movements above the extraction level. READ MORE
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5. Drill process monitoring in percussive drilling for location of structural features, lithological boundaries and rock properties, and for drill productivity evaluation
Abstract : This thesis deals with the application of percussive drill monitoring in the mining and underground construction industries. The technique has been used to provide information on different ground properties and conditions and for drill productivity evaluation. READ MORE