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Continuous Recorder to Monitor Mine Roof Displacement.

Authors
Radcliffe-DE; Fitzsimmons-JR
Source
NTIS: PB 277 265 :12 pages
Link
NIOSHTIC No.
10007992
Abstract
This report describes an instrument system developed by the Bureau of Mines to continuously monitor and record changes in roof displacement during underground mining activity. The instrument consists of a single-wire extensometer coupled to a mechanical-drive chart recorder mounted in an aluminum frame installed in the roof. The unit is small and simple to install and meets safety requirements for use in underground coal mines.
Publication Date
19770101
Document Type
IH;
Fiscal Year
1977
NTIS Accession No.
PB-277265
NTIS Price
A03
Identifying No.
TPR 104
Source Name
NTIS: PB 277 265
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