MASTER'S THESIS Investigation of Borehole Stability in

• Main Authors: Rajib Ghosh, Agenta Nordmark, Thomas Savilahti, Jyri Merilläinen, Fredrik Ersholm, Veronicka Wikström, Joel Andersson, Per Lidström, Hans Älgdahl, Sven-erik Wennebjörk, Hanna Falksund, Anders Johnsson, Torgny Rynbäck, Peter Malmgren
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Kiruna; Töre; Luleå; Malmberget
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.248.7951; http://pure.ltu.se/portal/files/40328593/LTU-EX-2012-40321649.pdf

This thesis has been sponsored by LKAB in Sweden. The whole thesis work has been carried out at Malmberget. It involves the investigation of borehole instability in different ore bodies in the mine and how instabilities are affected by various mining activities as the mining progresses downward are well described. It was also an opportunity for me to understand the practical problems associated in Rock Mechanics and Rock Engineering field. I would like to express my sincere gratitude to my supervisor Zongxian Zhang at LKAB, Malmberget, for his unremitting source of assistance during this work. This thesis would not have been accomplished successfully in time without him. I wish to give thanks to my supervisor Ulf Nyberg at Luleå University of Technology for his valuable supervisions and comments. Finally, I am grateful to my examiner Daniel Johansson at Luleå University of Technology for his precise comments. Special thanks to Anders Nordqvist at LKAB, Kiruna, for his valuable instructions about the setup of camera in the mine and providing necessary data. Special credit goes to the chargers who have been helpful during the field work. Especially, I have to thank Töre Nilsson for his relentless support during filming. I am also grateful for getting information and other helps from different personnel at different