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'Rib-in-roc' pre-reinforcement system for large underground openings
Luleå tekniska universitet.
1980 (English)In: Tunnels and Tunnelling, ISSN 0041-414X, Vol. 12, no 9, p. 23-37Article in journal (Refereed) Published
Abstract [en]

Before any full-scale excavation takes place under the Rib-in-Rock method, an entry is made in the host rock and rib raises are driven around the proposed opening. These raises are spaced at intervals dependent upon rock quality; an opening in poor rock needs more ribs per length of opening. As the ribs are driven they are used as a site from which competent rock bolting can be carried out. As a rib is excavated, it is filled with reinforced concrete. Finally, after the proposed opening has been reinforced, the displacements are automatically controlled as the opening is being excavated. Using this method, openings with a span of 50-60m and a height of 60-80m can be achieved. This paper summarises the results of a two-and-a-half year research programme, the objective of which was to develop a fundamental understanding of the Rib-in-Roc method. Through the development of a new model technology, namely three-dimensional physical models which powerfully exploit the results of dimensional analysis it has been possible to establish the contribution to both permanent and immediate stabilization of a large underground opening prereinforced by the Rib-in-Roc method. The paper demonstrates that the Rib-in-Rock method is a practical working system of pre-reinforcement

Place, publisher, year, edition, pages
1980. Vol. 12, no 9, p. 23-37
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-9293Local ID: 7e1ef570-e6a6-11dc-bcb4-000ea68e967bOAI: oai:DiVA.org:ltu-9293DiVA, id: diva2:982231
Note

Godkänd; 1980; 20080229 (cira)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-02-05Bibliographically approved

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