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Microwave Measurement of Coal Layer Thickness.

Authors
Ellerbruch-DA; Adams-JW
Source
NTIS: Com 74-11643 Available for Reference At Bureau Libraries :33 pages
Link
NIOSHTIC No.
10008079
Abstract
The possibility of using a microwave system to measure coal layer thickness in a mine was investigated. Measurements were made in two different mines near Pittsburgh, Pennsylvania, and near Fairview, West Virginia. Frequencies in the range from 0.5 Ghz to 4.0 Ghz were used to measure samples 10 to 40 cm thick. All samples were backed with a naturally occurring draw slate. The results indicated a definite possibility of determining layer thickness in most cases, although anomalies may introduce enough error to give misleading results in some cases. Data from a model and measured data show considerable agreement.
Publication Date
19740101
Document Type
CP; Final Contract Report;
Fiscal Year
1974
NTIS Accession No.
COM 74-11643
NTIS Price
A04
Identifying No.
OFR 101-75
Source Name
NTIS: Com 74-11643 Available for Reference At Bureau Libraries
State
PA; VA; WV;
Performing Organization
National Bureau of Standards
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division