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Production-blast-induced crosscut performance in a weak biotite schist: a comparison of three high-deformation bolt types
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-3661-1802
Number of Authors: 12016 (English)In: Proceedings of the 8th International Symposium on Ground Support in Mining and Underground Construction / [ed] E . Nordlund, T.H. Jones and A. Eitzenberger (eds), 2016Conference paper, Published paper (Refereed)
Abstract [en]

In 2011, a test was installed in a crosscut on the 1022 level of the Malmberget Norra Alliansen orebody . The goal of this test was to investigate bolting support regimes and their impact on the long-term performance of the crosscut. They were installed in the most problematic geology found in the mine, weak biotite schist located primarily along the footwall contact. Three test zones included Kiruna bolts, D-bolts, and Swellex bolts, were instrumented with multi-point extensometer and strain-gaged bolts in an effort to capture the response of the bolts and the rock to both time and mine-induced stress changes. Full deformation and strain profiles in each test section indicate differences in bolt performance and stress-induced patterns occurring in the walls, shoulders and back of each bolting profile.

Place, publisher, year, edition, pages
2016.
Keywords [en]
sub-level caving, rock bolt, deformation, convergence, strain, Civil engineering and architecture - Geoengineering and mining engineering
Keywords [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-28690Local ID: 295a9687-33c5-41b2-85b1-2f4c99b7ac33ISBN: 978-91-7583-804-5 (electronic)OAI: oai:DiVA.org:ltu-28690DiVA, id: diva2:1001893
Conference
Ground Support 2016 : 11/09/2016 - 14/09/2016
Note

Upprättat; 2016; 20160421 (trijon)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-06-12Bibliographically approved

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Type fulltextMimetype application/pdf

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Jones, Tristan

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CiteExportLink to record
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Output format
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