Blast design and vibration control at an underground metal mine for the safety of surface structures

•The ore of Kayad underground Pb-Zn mine contains 10.61% Zn, 1.61% Pb and 33 ppm Ag.•The mining is being carried out by sublevel open stoping method.•The Kayad village is only 100 m horizontally away from the underground mining areas.•In total 1203 blasts from development face, slot raise and ring were conducted and 2612 vibration data were monitored.•Precious mineral is being exploited from underground mines with the help of optimised blast design without any damage to surface structures.