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Pillar-Trimming SystemTrimming and reinforcing of coal pillars allows more coal recovery. Conceptual coal-pillar trimming machine use two counterrotating cutting drums to take corners off roof support pillars in coal mines.
Document ID
19840000160
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Collins, E. R., Jr. (CALTECH)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: NASA Tech Briefs
Volume: 8
Issue: 3
ISSN: 0145-319X
Subject Category
Machinery
Report/Patent Number
NPO-15848
Report Number: NPO-15848
ISSN: 0145-319X
Accession Number
84B10160
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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