Search for dissertations about: "Mining and Rock Engineering"
Showing result 11 - 15 of 162 swedish dissertations containing the words Mining and Rock Engineering.
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11. DEM Modelling and Simulation of Cone Crushers and High Pressure Grinding Rolls
Abstract : The comminution of rock and ore materials consumes ~1.5-1.8 % of the total energy production in mining intensive countries (Tromans, 2008). Several research findings show that there are ways of utilizing compressive breakage modes that are more energy efficient compared to conventional grinding circuits based on large inefficient tumbling mills. READ MORE
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12. Hole deviations in percussion drilling and control measures : theoretical and field studies
Abstract : In this thesis, we study the problem of hole deviations in percussive drilling and present a solution to minimize the deviations. Field tests are performed to study the interactive behaviour of drilling parameters. READ MORE
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13. Pure shear fracture of brittle rock : a theoretical and laboratory study
Abstract : This doctoral thesis deals with determination of Mode II fracture toughness, KIIc, for rock. Three types of specimens, antisymmetric four-point bending, direct shearing and compression-shear specimens, are experimentally and numerically investigated. READ MORE
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14. Freezing Temperature Flows in Railway Tunnels and its Consequence on the Rock Supporting Structure, the Rock and the Reinforcing Elements
Abstract : Water in the surrounding rock mass flows into the tunnel via naturally occurring joints and via cracks caused by the blasting used to excavate the tunnel. The most common method in Sweden to reduce or prevent leakage problems are first and foremost the use of grouting. READ MORE
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15. REAL TIME OPTIMIZATION OF ROCK CRUSHERS
Abstract : Cone crushers are used in the mineral, mining, and aggregate industry for fragmentation of rock materials. Cone crusher control systems are widely used for wear compensation and machine protection. These systems ordinarily focus on the crusher and not the crushed products. READ MORE