Head-on blast hole accurate calibration device for coal mine semi-circular arch section roadway

The utility model relates to an accurate calibration device for a head-on blast hole of a semi-circular arch section roadway of a coal mine. The shot hole panel is a quarter arc shot hole panel; a rotating shaft outer pipe is arranged on one side edge of the shot hole panel and arranged on the outer...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GAO YANG, ZHANG LEI, ZHANG TENG, CHU HONGWEI, GUO HONGZENG, LIU HAO, ZHAO QISHENG, SU BENFU, ZHANG XIAOHUA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMUNITION BLASTING HEATING LIGHTING MECHANICAL ENGINEERING WEAPONS
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