METHOD OF REDUCING BOTTOM, SIDE WALL AND ROOF SQUEEZE IN DOG AND CHAMBER HEADINGS BY ROCK STRAIN RELIEVING THROUGH SHOOTING

Bibliographische Detailangaben

Hauptverfasser:	ZYLINSKI RYSZARD, URBANCZYK JAN, SZCZEPANIAK ZENON
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING MINING OR QUARRYING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SHAFTS TUNNELS
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