ABSTRACT
Factors influencing ground vibration can be grouped into uncontrollable and controllable factors. Factors like geological condition, structure, lithology and distance and location of structure come under category of uncontrollable factors (Winzer & Ritter, 1980; Sinha, 2000). Parameters like type of explosives used, burden and spacing, geometry of shot, sub-drilling, stemming, delay timing, charge weight per delay, direction of blast initiation can be grouped together as controllable factors (Stagg & Engler, 1980; IS, 1982). The intensity of vibration increases as the quantity of charge detonated increases per delay. The selection of suitable delay interval is extremely important in multi-row blasts (Sinha & Nath, 2005).
