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In situ stress at the Lucky Friday Mine (in four parts). 3. Reanalysis of overcore measurements from the Star Mine.

Authors
Whyatt-JK; Beus-MJ; Larson-MK
Source
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, RI 9567, 1995 Jan; :1-36
NIOSHTIC No.
20024019
Abstract
U.S. Bureau of Mines researchers reviewed an in situ stress estimate developed from measurements of overcore strain taken at test sites on the 7300 and 7500 levels of the Star Mine near Mullan, Idaho. Although the field measurements of overcoring strain were found to be useful, significant deficiencies were found in the stress estimation procedure. A new stress estimate was developed incorporating statistical methods and an improved understanding of stress concentration factors for interpreting overcore strains recorded by doorstopper cells. Spatial variability of overcore strains and the implications for stress field variability were explored.
Keywords
Mining-industry; Underground-mining; Rock-bursts; Rock-falls; Rock-mechanics; Geology
Publication Date
19950101
Document Type
Report of Investigations
Fiscal Year
1995
NTIS Accession No.
PB95-271276
NTIS Price
E05
Identifying No.
RI-9567
ISSN
1066-5552
NIOSH Division
SRC
Source Name
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, RI 9567
State
ID; WA
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