NASA NTRS · 19850000240
Service Modules for Coal Extraction
Abstract
Service train follows group of mining machines, paying out utility lines as machines progress into coal face. Service train for four mining machines removes gases and coal and provides water and electricity. Flexible, coiling armored carriers protect cables and hoses. High coal production attained by arraying row of machines across face, working side by side.
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Gangal, M. D., Lewis, E. V.. 1985-10-01. Service Modules for Coal Extraction. https://ntrs.nasa.gov/citations/19850000240
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