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Analysis of seismicity at Mufulira Mine, Copperbelt Province, Zambia

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Title: Analysis of seismicity at Mufulira Mine, Copperbelt Province, Zambia
Authors: Sinkala, Pardon Browse this author
Nishihara, Masahiro Browse this author
Fujii, Yoshiaki Browse this author →KAKEN DB
Kodama, Jun-ichi Browse this author →KAKEN DB
Fukuda, Daisuke Browse this author →KAKEN DB
Chanda, Ellan Browse this author
Keywords: Rock mass
Induced stress
Seismic monitoring system
Issue Date: 6-Mar-2019
Publisher: 資源・素材学会
Journal Title: 資源・素材講演集
Journal Title(alt): Proceedings of MMIJ Annual Meeting
Volume: 6(2019)
Issue: 1(春・千葉)
Abstract: Microseismicity and its associated rockburst damage constitute a great risk to underground mining operations at Mufulira mine. This mine is located in the Copperbelt province of Zambia, hosting sulphide orebodies, which are rich copper and cobalt mineralization. The rock units are metamorphic sedimentary rocks of the Neoproterozoic Katanga Supergroup. Mufulira mine has been in operation since 1933, mainly in copper production. Serious events of microseismicity and the associated rockburst damage began to be recorded at the mine since the inception of 1970s. In January, 2018, the mine recorded a seismic event of magnitude 2.8, which caused severe rockburst damage in the mining drive at a depth of 1440 meters below surface. The capacity to measure microseismic movements at Mufulira mine was first built in 1991, but the system had low efficiency in providing adequate quantitative parameters of seismic events. Therefore, in December 1994, an integrated seismic system (ISS) was purchased from South Africa and installed to record mining induced seismicity at Mufulira mine. The system deteriorated with time, but in 2006 the mine made efforts to update the system through the addition of new sensors. This paper analyzes microseismicity at Mufulira mine based on trends of seismic events from 2016 to 2018, and proposes possible remediation measures to seismic damages. The overall aim of this study is to provide knowledge for management's decisions to improve safety in seismic prone underground mines, so as to sustain production, and enhance consistent generation of revenue.
Description: 一般社団法人資源・素材学会 平成31(2019)年度 春季大会、2019年3月6日~8日、千葉工業大学 津田沼キャンパス、習志野市
Conference Name: 一般社団法人資源・素材学会 平成31(2019)年度 春季大会
Conference Place: 習志野市
Type: proceedings
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤井 義明

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