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Field Measurements and Corresponding Finite Element Analysis of Closure During Shaft Sinking At the Lucky Friday Mine.

Authors
Gooch-AE; Conway-JP
Source
NTIS: PB 262 738 :19 pages
Link
NIOSHTIC No.
10000973
Abstract
The Bureau of Mines conducted research in an attempt to provide a more sound basis for recommending improved artificial support during deepening of the main shaft of the Lucky Friday Mine in the Coeur d'Alene Mining District of northern Idaho. Field measurements of closure across the short axis of the 13- by 26-foot shaft were as high as 16 inches. Elastic/plastic finite-element (f/e) analyses wer made, reducing the values of large-scale in situ rock mass properties until field closure measurements generally corresponded to displacements in the f/e analyses. Resulting plots of rock mass displacements, stresses, and areas of plastic failure display the results of creating openings (shaft, in this case) in deep mines in difficult ground conditions requiring artificial support.
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-262738
NTIS Price
A03
Identifying No.
RI 8193
NIOSH Division
SRC;
Source Name
NTIS: PB 262 738
State
ID;
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