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Field Studies in an Unsupported Roof, York Canyon Coal Mine, Raton, New Mexico.

Authors
Stateham-RM
Source
NTIS: PB 231 122 :18 pages
Link
NIOSHTIC No.
10000992
Abstract
Infrared and displacement studies were made of an unsupported roof in Kaiser Steel Corp.'s York Canyon Coal Mine, Raton, New Mexico. Monitoring of the roof continued until the roof over the area was caved. Loose slabs in the roof, about 6 inches thick, were detected by means of associated thermal anomalies, using remote-sensing infrared instruments. Displacement measurements taken during the study indicate that roof movement was cyclic in nature; the cycles appear to have been related to the mine work cycle (work days to idle days).
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-231122
NTIS Price
A03
Identifying No.
RI 7886
NIOSH Division
DRC;
Source Name
NTIS: PB 231 122
State
NM;
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