... with backfilled soil. After a comparative analysis of the monitoring data, the authors define the key controlled zones of rock unsymmetrical deformation and stress concentration, they advise some effective measures to avoid partial tunnel destruction. Through monitoring the blasting vibration on key controlled...

... ABSTRACT The Hishikari Mine, the only gold mine operating in Japan, consists of epithermal gold-silver veins. In 2007, the mine produced 183,000 tonnes of ore, with gold grade of 46 g/t. The veins are extracted mainly by drifting and bench stoping with backfill. Blasted waste rocks...