ABSTRACT
Both slurry and emulsion explosive were developed to make ANFO water résistant. Unlike ANFO, in slurry explosives both oxidizer and fuel are in liquid form and cross linked to give gel consistency. The gel structure of an explosive prevents the intrusion of water and makes it water resistant. A large reduction in the VOD, vibration and burden velocity of site mixed slurry explosive (SMS) was observed when these were used in wet holes (Cameron & Grouchel, 1990). The performance of SMS in a blast hole, which was full of water, was evaluated by National Institute of Rock Mechanics, India. The VOD at the bottom was found to be 4036 m/s, while at the top it was only about 1000 m/s, indicating deflagration of explosive (NIRM 2001). The density of slurry explosive varies from 0.7 g/cc to 1.15 g/cc.
