Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Evaluation of several natural gamma radiation systems - a preliminary study.

Authors
Maksimovic-SD; Mowrey-GL
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9434, 1995 Jan; :1-48
NIOSHTIC No.
20023489
Abstract
An important element of the U.S. Bureau of Mines (USBM) mining research program is the development and evaluation of reliable coal interface detection (CID) systems. Commercially available CID sensors based on natural gamma radiation (NGR) are only applicable if the immediate roof is composed of shaley material. The USBM has made numerous underground and laboratory measurements using several NGR systems approved for installation on mining machines by the Mine Safety and Health Administration. In addition, two small handheld NGR instruments were used to make comparative measurements. Underground NGR measurements in 10 different coal seams, potassium-uranium-thorium radiometric analyses on samples from 16 seams, and chemical analyses of coal and rock for correlation with NGR counts were made. Laboratory test results on the effect of airgap and sample thickness, size, and weight on the NGR measurements, as well as general results of the various NGR systems, are discussed.
Keywords
Mining-industry; Underground-mining; Detectors; Mining-equipment; Ground-control; Coal-mining; Monitoring-systems
Publication Date
19950101
Document Type
Information Circular
Fiscal Year
1995
NTIS Accession No.
PB96-128608
NTIS Price
A04
Identifying No.
IC-9434
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 9434
State
PA
TOP