NTRS - NASA Technical Reports Server

Back to Results
Relationship of roof falls in underground coal mines to fractures mapped on ERTS-1 imageryERTS imagery is of unique value for mapping of certain fractures that are not identifiable on aircraft imagery. Because color infrared and ERTS imagery complement each other both sources of data were used to map fractures in western Indiana and eastern Illinois. In the Kings Station Mine, Gibson County, Indiana, most roof falls reported had occurred in areas where mapped fractures were closely spaced and intersecting. Using this information as a basis for extrapolation, roof fall hazard maps were prepared for other mine sites. Various coal resources programs related to energy and environment also were conducted.
Document ID
Document Type
Conference Paper
Wier, C. E.
(Indiana Geological Survey Washington, DC, United States)
Wobber, F. J.
(Earth Satellite Corp. Washington, DC, United States)
Russell, O. R.
(Earth Satellite Corp. Washington, DC, United States)
Amato, R. V.
(Earth Satellite Corp. Washington, DC, United States)
Leshendok, T. V.
(Earth Satellite Corp.)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Publication Information
Publication: NASA. Goddard Space Flight Center 3d ERTS-1 Symp., Vol. 1, Sect. A
Subject Category
Report/Patent Number
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available