Anti-blocking and dredging device for underground drain hole

The utility model discloses an anti-blocking and dredging device for an underground drainage hole, and relates to the technical field of mine drainage. The anti-blocking and dredging device for the underground drainage hole comprises the drainage hole and further comprises an anchoring rib, a circul...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LAI ZHONGSHAN, BAI CHAOXIANG, SUN CHAO, ZHANG YITANG, TAO LEI, WANG QI, XI TINGTANG, ZHANG QIANG, LIU ZHIYONG, WANG YUFU, ZHOU LIN, TIAN QIZHI, LI WANGBING, FAN XIAOHUI, WANG YAHUI, WANG NANNAN, XIE BINGXIANG, ZHU ZHIGUO, WEN ZHENGFA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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