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Blasthole Underreamers for Surface and in Situ Mining.

Authors
Hustrulid-WA
Source
NTIS: PB/273-652 Available for Reference At Bureau Libraries :215 pages
Link
NIOSHTIC No.
10001524
Abstract
A technical and economic evaluation of the potential for improving mining productivity through the use of underreamers in blastholes, specifically in relation to Minnesota taconite, Arizona surface copper, and in situ mining operations is presented. Included are (1) a review of the drilling and blasting practices presently being used; (2) a discussion of current underreamer technology; (3) the presentation of a general economic cost model for underreaming; (4) the application of the model to surface taconite, surface copper, and in situ mining; and (5) a summary discussion including required performance specifications, potential overall benefits, and recommendations for further development.
Publication Date
19770101
Document Type
CP; Final Contract Report;
Fiscal Year
1977
NTIS Accession No.
PB-273652
NTIS Price
A11
Identifying No.
OFR 148-77
NIOSH Division
TCRC;
Source Name
NTIS: PB/273-652 Available for Reference At Bureau Libraries
State
AZ; MN;
Performing Organization
Terra Tek, Inc.
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