Slitting type cutting coal-mining method capable of raising lump-coal yield and special large intercept coal-cutting drum

The present invention relates to an underholed cutting coal-mining method for raising block coal rate and its special-purpose large intercept coal-mining cylinder. Said special-purpose large-intercept coal-mining cylinder includes the following several portions: end cover, cylinder body, helical bla...

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Bibliographische Detailangaben
Hauptverfasser:	YAN XIUZUN, CONG ZIYUE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS MINING MINING OR QUARRYING
Online-Zugang:	Volltext bestellen
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