Search for dissertations about: "underground"

Showing result 1 - 5 of 178 swedish dissertations containing the word underground.

2. 1. Short-term Underground Mine Scheduling : Constraint Programming in an Industrial Application

   Author : Max Åstrand; Mikael Johansson; Christian Schulte; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; scheduling; mining; mine; underground; constraint programming; cp; large neighborhood search; lns; Electrical Engineering; Elektro- och systemteknik;

   Abstract : The operational performance of an underground mine depends critically on how the production is scheduled. Increasingly advanced methods are used to create optimized long-term plans, and simultaneously the actual excavation is getting more and more automated. READ MORE

4. 2. Working in underground offices

   Author : Edit Nagy; Institutionen för psykologi; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Applied and experimental psychology; multidimensional scaling techniques; multiple sorting task; survey construction; conceptual systems; employee perceptions; underground offices; Work environment; Japan; Japan; Tillämpad och experimentell psykologi;

   Abstract : The present doctoral dissertation discusses Japanese office employees' psychological reactions to their underground work environment. Studies I and III were methodological in nature and aimed at developing and validating instruments to be used in the empirical studies. READ MORE

5. 3. Design fires in underground hard rock mines

   Author : Rickard Hansen; Haukur Ingason; Håkan Frantzich; Mälardalens högskola; []
   Keywords : Design fire; underground; hard rock mine; vehicle fire; smoke spread; Energy- and Environmental Engineering; energi- och miljöteknik;

   Abstract : During several decades considerable research activities have been conducted with respect to fires in coal mines, but the research activities with respect to hard rock mines have been limited. As the hard rock mines are getting more complex the need for deeper understanding of fires in underground hard rock mines are getting more in demand. READ MORE

6. 4. Short-term Underground Mine Scheduling : An Industrial Application of Constraint Programming

   Author : Max Åstrand; Mikael Johansson; Mats Carlsson; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; scheduling; mining; underground mines; constraint programming; large neighborhood search; korttidsplanering; gruvdrift; underjordsgruvor; villkorsprogrammering; Electrical Engineering; Elektro- och systemteknik;

   Abstract : The mining industry is facing a surge in automation in the pursuit of safe and profitable operations. As the excavation process is increasingly automated, today's mining companies seek to optimize the coordination of the now automated mining activities. READ MORE

7. 5. Analysis of underground concrete pipelines subjected to seismic high-frequency loads

   Author : Roghayeh Abbasiverki; Anders Ansell; Jan Laue; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Earthquake; High-frequency; Underground; Pipelines; Reinforced concrete; Inclined bedrock; Jordbävning; Högfrekvent; Underjordisk; Rörledningar pipelines ; Armerad betong; Lutande berggrund; Civil and Architectural Engineering; Byggvetenskap;

   Abstract : Buried pipelines are tubular structures that are used for transportation of important liquid materials and gas in order to provide safety for human life. During an earthquake, imposed loads from soil deformations on concrete pipelines may cause severe damages, possibly causing disturbance in vital systems, such as cooling of nuclear power facilities. READ MORE