Search for dissertations about: "fracture frequency on rock"
Showing result 1 - 5 of 9 swedish dissertations containing the words fracture frequency on rock.
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1. 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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2. 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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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. Characterisation of Fractured Rock for Grouting Using Hydrogeological Methods
Abstract : Sealing of tunnels by grouting demands knowledge concerning the fractured rock and the grout, followed by an appropriate choice of strategy and equipment. In this thesis, the characterisation of rock is the main issue and, since it addresses the engineering problem of producing a description for grouting, the properties of grout and the grouting procedure need to be considered. READ MORE
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5. Inventory of geomechanical phenomena related to train-induced vibrations from tunnels
Abstract : Banverket is expecting that the number of railway tunnels in densely populated areas will increase over the next 20 years due to the lack of available space on the ground surface, but also since the railway is considered an environmentally friendly solution of transportation for the future. The need for good predictions of vibration and noise levels in dwellings along the planned tunnels is therefore evident. READ MORE