ACHIEVING A GOOD BLASTING:POST AND PRE BLASTING INSPECTION IS THE KEY
Pre Blasting and post Blasting inspection for data collection and blast design is very important so as to performance a profitable and productive Blasting. Some of the pre-blasting inspection carried out before Blasting includes; 1. Ground water condition (in-hole water check) 2. Rock face discontinuity mapping 3. Drilling parameters collection. 4. Free face checking. 1. Ground water condition (in hole water) Water may be present in the mine either through surface inflow or underground water outflow. Ground water condition affects Blasting materials, expecially when using a non water resistant Explosive like ANFO. This may result into MISFIRE and poor fragmentation. All holes must be inspected and those with water should be noted. Water tend to reduce the sensitivity of non water resistant Explosive. Explosive like Dynogel and emulsion gel and other water resistant Explosive should be use in noted water filled holes. Hole with water can also be drained or flush by high pres...