NASA NTRS · 19840000151
Automatic Coal-Mining System
Abstract
Coal cutting and removal done with minimal hazard to people. Automatic coal mine cutting, transport and roof-support movement all done by automatic machinery. Exposure of people to hazardous conditions reduced to inspection tours, maintenance, repair, and possibly entry mining.
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Collins, E. R., Jr.. 1985-01-01. Automatic Coal-Mining System. https://ntrs.nasa.gov/citations/19840000151
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