Double-layer pipe hole sealing method for directional long drill hole in thick coal seam mining pressure relief zone

The invention discloses a thick coal seam mining pressure relief zone directional long drill hole double-layer pipe hole sealing method which comprises the following steps: analyzing and researching a pressure relief zone range around a stope face goaf by adopting comprehensive analysis methods such...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG MINGJIE, JIANG WEIPO, DU ZHIQING, ZHANG WEIHUA, ZHANG HONGYU, YANG SHUO, ZENG BIN, SUN WENJIAN, ZHU HE, NIE HAIJUN
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 SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS
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