What Are Temporary Works? Temporary works refer to structures that are not part of the…
Monday Tech Talks – Blasting Operations
Blasting, is the process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include: drilling holes; placing a charge and detonator in each hole; detonating the charge, and clearing away the broken material.
Other aspects also play a role when blasting is concerned, monitoring ground vibrations & flyrock should also be in consideration. When conducting blasting, one should apply for a permit of explosive and must have a blasting plan in place.
What is blasting?
- Blasting, process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include:
- (1) drilling holes;
- (2) placing a charge and detonator in each hole;
- (3) detonating the charge, and
- (4) clearing away the broken material.
Ground vibration monitoring records vibrations caused by traffic and construction projects as well as quarry and mining operations. Engineers and construction companies usually assess their ground vibration to make certain that machinery and construction work does not cross a threshold, causing structural damage to neighboring buildings and infrastructure. Likewise, quarry and mine operators monitor the vibration caused by blasts, compaction methods, and heavy machinery/equipment. In some instances, they use the monitors to measure the damaging air overpressure caused by a blast and fine tune their blasting techniques.
•All ground vibration is of some concern. Most heavy construction projects, centered in urban areas and industries involved in blasting, require monitoring of the ground vibration that they cause. However, that doesn’t mean that homeowners or businesses near these sites should not contract an experienced company to perform ground vibration monitoring. The ability to prove that ground vibration from an outside source caused or did not cause damage protects those that pay to conduct a survey. Ultimately, the reports from vibration monitors prove helpful in demonstrating whether vibration is great enough to cause concern or not.
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