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Temperature Investigations on Resin-anchored Bolts.

Authors
Stateham-RM; Sun-MC
Source
NTIS: PB 261 333 :29 pages
Link
NIOSHTIC No.
10000916
Abstract
The Bureau of Mines evaluated temperature increases on the heads of resin-grouted bolts as indicators of the integrity of the anchoring of the bolt. Expected increases were calculated by the finite difference method; the calculations were checked by bolthead temperature measurements, both in the laboratory and in the field. The accuracy of the calculations varies with the validity of assumptions necessary to the process. Measurements in the laboratory produced a temperature rise of about 4.0 Deg f on the head of a 4-foot bolt when installed with a full column of resin. This increase remained for about 30 minutes. Similar increases were noted on bolts installed at the White Pine Mine, White Pine, mich., But bolthead temperature increases in the mine lasted only about 10 to 15 minutes. When partial columns (reduced amounts) were used, the temperature increases were smaller.
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-261333
NTIS Price
A03
Identifying No.
RI 8178
NIOSH Division
DRC;
Source Name
NTIS: PB 261 333
State
MI;
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