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Controlled blasting in hard intense jointed rock in tunnels
Luleå tekniska universitet.
Luleå tekniska universitet.
Luleå tekniska universitet.
1985 (English)In: CIM bulletin, ISSN 0317-0926, E-ISSN 1718-4169, Vol. 78, no 884, p. 63-68Article in journal (Refereed) Published
Abstract [en]

Full-scale tests have been done at LKAB in hard intense jointed magnetite ore. Four different types of perimeter charges have been tested: tube charges, ANFO mixed with plastic beads, detonating cord and linear-shaped charges. Three types of initiation of the perimeter holes have been used: conventional (half-second delay detonators), instantaneous and ultra short cutblasting initiation (1. 5 ms delay). Cutblasting with detonating cord in the perimeter holes gave the smallest damage to the surrounding rock. A new classification system for controlled blasting regarding the damage to the surrounding rock has been devised.

Place, publisher, year, edition, pages
1985. Vol. 78, no 884, p. 63-68
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-10296Local ID: 91728bd0-0980-11dd-ae49-000ea68e967bOAI: oai:DiVA.org:ltu-10296DiVA, id: diva2:983238
Note

Godkänd; 1985; 20080413 (cira)

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

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