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Effects of Time Between Exposure and Support on Mine Roof Stability, Bear Coal Mine, Somerset, Colorado.

Authors
Radcliffe-DE; Stateham-RM
Source
NTIS: PB 291 015 :13 pages
Link
NIOSHTIC No.
10000905
Abstract
The Bureau of Mines studied the displacement of the roof in a portion of the Bear Coal Mine near Somerset, Colorado. Horizontal- and vertical-displacement gages were installed in a five-entry section during normal room-and-pillar mining procedures. Monitoring of the roof continued until this section was mined out. Displacement measurements in combination with known time lapses between mining and bolting operations indicate that once support is achieved, the length of unsupported time does not appear to affect long-term roof stability in the mine under investigation.
Publication Date
19780101
Document Type
IH; Report of Investigations
Fiscal Year
1978
NTIS Accession No.
PB-291015
NTIS Price
A03
Identifying No.
RI 8298
NIOSH Division
DRC;
Source Name
NTIS: PB 291 015
State
CO;
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