Device for testing water flow at hole opening of underground water exploration and drainage drill hole of coal mine

A water flow testing device for a hole opening of an underground water exploration and drainage drill hole of a coal mine comprises a construction drill hole, and a limiting block is arranged at the rear end of the construction drill hole; the water conveying pipe is slidably connected to the constr...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG BO, BAI TIANYU, AI BINGYANG, CHEN XILONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING EARTH DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING PIPES SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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