High-step small-aperture vertical drilling lateral funnel group blasting excavation process

The invention discloses a blasting excavation process for a high-step small-aperture vertical drilling lateral funnel group. The hole diameter of the drill hole is much smaller than that of a conventional one-time detonating step height matched drill hole, the blasting explosive quantity is calculat...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG DAN, DENG JIA, FAN JI, ZHANG PAN, BAO HAOWEN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMUNITION BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS WEAPONS
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