Sökning: "Underground mining"
Visar resultat 41 - 45 av 70 avhandlingar innehållade orden Underground mining.
41. Draw control strategy for sublevel caving mines : A holistic approach
Sammanfattning : Sublevel caving is an underground mass mining method used for extracting different types of ores from the earth crust. Mines using sublevel caving (SLC) as the primary mining method are generally highly mechanized with standardized and independent unit operations. LÄS MER
42. Deformation and failure of hard rock under laboratory and field conditions
Sammanfattning : The understanding of the fracture mechanisms and failure processes of the rock is an important requirement for the design of mining excavations and civil engineering constructions. The fracture process is necessary for the excavation and fragmentation of rock, but fracture of rock must be avoided and controlled to preserve the integrity of the construction. LÄS MER
43. Excavation damage from blasting with emulsion explosives : Quality control and macro fracturing in the remaining rock
Sammanfattning : 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. LÄS MER
44. Rock Mass behavior and Cap Rock Stability at the Malmberget Mine
Sammanfattning : Rock Mass behavior and Cap Rock Stability at the Malmberget MineThe LKAB Malmberget mine is mined using sublevel caving. This mining method requires continuous caving of the hangingwall, which also result in ground deformations on the surface. LÄS MER
45. Burden Dynamics and Fragmentation
Sammanfattning : Drill and blast is a dominant technique in several surface and underground mines in the world. The purpose of this technique is to break rock mass into fragments, which can be handled by mining equipment. The identified major influencing factors in rock blasting are stress waves and gas pressurization. LÄS MER