Version of jaw miner operates without mechanical cutting and crushing. Forward-pointing jets of water dislodge and break up coal. Rearward-pointing jets further break up coal and force particles into slurry chamber. Oscillatingjet mechanism itself stays within "jaw" structure and protected from wear and tear associated with coal handling. All-jet machine generates even less dust than anger, therefore poses lesser explosion or health hazard.
All-Water-Jet Coal Excavator
NASA Tech Briefs ; 9 , 2
1985-10-01
Miscellaneous
No indication
English
Hydromechanical Advanced Coal Excavator
NTRS | 1990
|Continuous Excavator for Surface Coal Mining
SAE Technical Papers | 1977
|