Between Dec 19, 2024 and Jan 2, 2025, datasets can be submitted to DRUM but will not be processed until after the break. Staff will not be available to answer email during this period, and will not be able to provide DOIs until after Jan 2. If you are in need of a DOI during this period, consider Dryad or OpenICPSR. Submission responses to the UDC may also be delayed during this time.
 

Weakending of Taconite in Small Scale Explosive Tests

Loading...
Thumbnail Image

View/Download File

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Weakending of Taconite in Small Scale Explosive Tests

Published Date

2000-11-01

Publisher

University of Minnesota Duluth

Type

Technical Report

Abstract

The primary objectives in blasting taconite are to produce broken rock that permits optimum digging and shovel loading rates with minimum secondary breakage and eliminates primary crusher delays. Since at least 1990, much of the blasting research by explosives companies, academics, and mining companies has been directed toward determining the downstream benefits of increased blast energy, particularly on crushing and coarse grinding. Several papers have been published that attempt to quantify the cost benefits. However, so many variables are involved that most benefits are only indicated or estimated. A report entitled "Effects of Blasting on Milling," by C. M. Lownds and D. A. Bocca of Viking Explosives & Supply, Inc., and K. Nielsen, Professor, Department of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, was presented at the 1997 Duluth, Minnesota, SME Annual Meeting. It describes a rather simple method of explosively loading taconite samples and of evaluating the explosive effects on grindability.1 " The small-scale explosive tests were conducted on taconite rock pieces collected from the back of a muckpile instead of on diamond drill core or sawed and drilled cubes, as described in previous work.2 · 3 The testwork described in the following report was proposed as a continuation of the tests on rock fragments to examine more extensively the effects of small-scale explosive tests on rock weakening.

Description

Related to

Replaces

License

Series/Report Number

NRRI Technical Report;NRRI/TR-2000/52
CMRL Technical Report;CMRL/TR-00-18

Funding information

University of Minnesota Duluth, Natural Resources Research Institute, 5013 Miller Trunk Highway, Duluth, MN 55811-1442; Coleraine Minerals Research Laboratory, One Gayley Avenue, Box 188, Coleraine, MN 55722

Isbn identifier

Doi identifier

Previously Published Citation

Other identifiers

Suggested citation

Niles, Harlan B; Bacca, D. A. (2000). Weakending of Taconite in Small Scale Explosive Tests. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/188331.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.