Precautions for Blasting in Civil Engineering
Blasting is used to demolish structures, digging holes, rock quarrying and for various other requirements in Civil Engineering. Use of powerful explosive makes blasting a highly sensitive and dangerous procedure. Nature of risks involved in blasting necessitates extreme precautions to ensure safety of workers and general public. Following points must be kept in mind while carrying out blasting.
- Person responsible for blasting operation should ensure that he is legally authorized to conduct the blasting and no state or local laws are being violated in any context.
- Make sure the suitable explosive is selected after proper calculations.
- Blasting should be made public with sufficient time allowed to retire to safe distance. Avoid conducting blasting operations during dark hours.
- Dangerous zone radius may vary depending upon the nature and amount of explosive being used. Minimum 200m radius danger zone should be marked with red flags.
- Make sure all workers are out of danger zone before firing takes place.
- First aid(Medical cover) should be made available.
- Safe and adequate arrangements be made for transportation of explosive to site.
- Firing point should be located at a place from where complete danger zone is visible.
- Maintain proper record of number of charges prepared, fired and exploded to account for misfires.
- Main explosive charge should be handled carefully and avoid exposure to high temperature, pressure or impact.
- Detonators and explosive should not be stored and kept together at any point before fixing them together on the final place.
- Use Rubber Gloves to handle cartridges.
- Maximum of 10 bore holes should be exploded at a time and that too successively and not simultaneously.
- Alternate firing method must be available to handle misfires.
- Complete blasting operation is required to be documented for future reference.