Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg
The core justification of this thesis was to delay expected failures by means of studying different sequencing patterns. This thesis reviews, analyzes and compares some of extraction methods and sequences used in steep orebodies. The subject of the research was proposed and supported by Boliden Mine...
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ftluleatu:oai:DiVA.org:ltu-57264 2023-05-15T17:09:13+02:00 Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg Ghasemi, Yahya 2012 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-57264 eng eng http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-57264 Local df1afd5b-f441-489f-bf44-f4e1b381f547 info:eu-repo/semantics/openAccess Technology Garpenberg Lappberget Examine 3D sequencing Teknik Student thesis info:eu-repo/semantics/bachelorThesis text 2012 ftluleatu 2022-10-25T20:53:04Z The core justification of this thesis was to delay expected failures by means of studying different sequencing patterns. This thesis reviews, analyzes and compares some of extraction methods and sequences used in steep orebodies. The subject of the research was proposed and supported by Boliden Mines and was conducted as a Master thesis in Luleå University of Technology.Models were calibrated using data from observed failures on levels 880, 896 and 926 in Lappberget orebody. Hoek-Brown criterion with modified parameters for brittle rock and Stacey’s extension criterion were used in the process of analysis.One major objective of the thesis is to decide the size of the stopes. For the purpose of comparison an index for crack propagation depth was introduced, the origin of the index is ELRD (equivalent linear relaxation depth) which was proposed as a tool to quantify the relaxation zone around excavations. Some modification was done on ELRD so it can be used for the goals of the project. Six variation of stope dimension was modeled in an isolated model. The comparison of stope dimension was studied in different sequencing patterns as well.Finally, seven different sequencing methods were suggested and studied for exploiting the ore. The sequencing methods include primary-secondary patterns with three alterations of stope size, tertiary patterns with two variations of stope size, a pillarless pattern and a twoway pattern (top-down and bottom-up). Validerat; 20121024 (anonymous) Bachelor Thesis Luleå Luleå Luleå Luleå University of Technology Publications (DiVA) Hoek ENVELOPE(-65.050,-65.050,-66.000,-66.000) Lappberget ENVELOPE(22.783,22.783,66.300,66.300) |
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collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Technology Garpenberg Lappberget Examine 3D sequencing Teknik |
spellingShingle |
Technology Garpenberg Lappberget Examine 3D sequencing Teknik Ghasemi, Yahya Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg |
topic_facet |
Technology Garpenberg Lappberget Examine 3D sequencing Teknik |
description |
The core justification of this thesis was to delay expected failures by means of studying different sequencing patterns. This thesis reviews, analyzes and compares some of extraction methods and sequences used in steep orebodies. The subject of the research was proposed and supported by Boliden Mines and was conducted as a Master thesis in Luleå University of Technology.Models were calibrated using data from observed failures on levels 880, 896 and 926 in Lappberget orebody. Hoek-Brown criterion with modified parameters for brittle rock and Stacey’s extension criterion were used in the process of analysis.One major objective of the thesis is to decide the size of the stopes. For the purpose of comparison an index for crack propagation depth was introduced, the origin of the index is ELRD (equivalent linear relaxation depth) which was proposed as a tool to quantify the relaxation zone around excavations. Some modification was done on ELRD so it can be used for the goals of the project. Six variation of stope dimension was modeled in an isolated model. The comparison of stope dimension was studied in different sequencing patterns as well.Finally, seven different sequencing methods were suggested and studied for exploiting the ore. The sequencing methods include primary-secondary patterns with three alterations of stope size, tertiary patterns with two variations of stope size, a pillarless pattern and a twoway pattern (top-down and bottom-up). Validerat; 20121024 (anonymous) |
format |
Bachelor Thesis |
author |
Ghasemi, Yahya |
author_facet |
Ghasemi, Yahya |
author_sort |
Ghasemi, Yahya |
title |
Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg |
title_short |
Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg |
title_full |
Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg |
title_fullStr |
Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg |
title_full_unstemmed |
Numerical studies of mining geometry and extraction sequencing in Lappberget, Garpenberg |
title_sort |
numerical studies of mining geometry and extraction sequencing in lappberget, garpenberg |
publishDate |
2012 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-57264 |
long_lat |
ENVELOPE(-65.050,-65.050,-66.000,-66.000) ENVELOPE(22.783,22.783,66.300,66.300) |
geographic |
Hoek Lappberget |
geographic_facet |
Hoek Lappberget |
genre |
Luleå Luleå Luleå |
genre_facet |
Luleå Luleå Luleå |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-57264 Local df1afd5b-f441-489f-bf44-f4e1b381f547 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766065193452830720 |