REPRESENTATIVE CONSULTING PROJECTS
Alabama, USA - A quarry had a vibration problem. It was using deck-loaded holes to reduce vibration at the nearest homes. Precision Blasting applied its Pre-Seis vibration control methods, which allowed the mine to shoot full columns of explosives rather than deck loading. This also allowed them to increase the size of their blasts and reduced the vibration at the nearest home to approximately 20% of the original value on a consistent basis.
Columbia, South America - A cement plant had a problem producing high quality limestone from one of their quarries. Fragmentation was poor, piled up against the face, and the operation had both floor and backbreak problems. All problems were corrected.
Hungary - An andesite quarry had problems with huge boulders and backbreak. After a site visit, a blasting plan was made which produced good fragmentation and totally removed the backbreak problem. This was accomplished while also reducing drilling and blasting costs by approximately 30 percent.
Canada - A large quarry in eastern Canada had to significantly reduce vibration because it was approaching a nearby housing subdivision. The mining operation wanted to reduce vibration without blasting more frequently. PBS produced a blasting plan that allowed the operation to shoot large shots while reducing the vibration.
Ohio - PBS worked with a coal mining company that utilized a large dragline and was having problems with overburden fragmentation. Precision Blasting worked with their engineers and increased the efficiency of the blasting which tripled the stripping rate per month for the operation.
West Virginia - PBS worked with a large strip mining company to help design a mountain top removal stripping operation. Precision Blasting was involved with the planning of the blasting rounds with the purpose of achieving good fragmentation as well as vibration and airblast control.
SURFACE MINING (METAL AND NONMETAL)
Mexico - An iron mining company wanted to use large diameter blastholes for controlled blasting so that slopes could be steeper without removal of additional overburden. PBS worked with the operation and set up a program to use large diameter holes for final controlled blasting.
Chile - A new copper mine was under development. PBS was required to do preliminary blast designs and costing for the new mine.
Guinea, West Africa - An open pit mine, which produced aluminum ore, was having problems with large boulders, extremely poor breakage and high costs. PBS found the problem, which involved an explosive that was burning rather than detonating. After the problem was corrected, the operation was able to produce good fragmentation while reducing their costs by 70%.
Minnesota - A large iron mine was having problems producing the desired fragmentation and pulling the bottom of the shot. PBS provided the assistance to solve their design problems.
Canada NWT-designed both presplit and production blasting patterns for a new diamond mine.
West Virginia - A highway contractor, blasting for an interstate highway, encountered problems with fragmentation and flyrock. PBS worked with them to improve blast design and eliminate both problems.
Texas - A contractor had the responsibility to shoot sewer line trenches along a main street of a city. Precision Blasting Services was called to design the blasts and conduct the first test blasts.
Ohio - A company that drills gas wells needed new technology for explosive stimulation of gas wells. Precision Blasting Services developed a better procedure and increased production rates by 250%
California - Worked on the Eastside Reservoir Project with a major contractor to optimize blast design. Different designs were needed in different rock types to produce proper fragmentation and to decrease costs.
Canada - Precision Blasting Services has worked with landfill construction to provide technical information and blast design parameters so that landfill integrity can be kept in tact while blasting close to the landfill.
Ohio - Precision Blasting Services has been involved with the blast design and vibration control on major landfill projects in the State of Ohio. The blasting for cell construction has been completed with no damage to adjoining cells or adjacent property.
Arkansas - Precision Blasting worked with a construction company to design blasting rounds for the removal of Titan II missile silos. The silos were made of heavily reinforced concrete and required blasting in such a manner that the silos would be demolished in one blast. Airblast and ground vibration specifications with 500 feet of the silos were 2.0 ips and 134 dB. Precision Blasting worked with the contractor to design blasts to meet specifications imposed by the US Army Corp of Engineers.
Alabama - PBS worked as a subcontractor to remove approximately 900 cubic yards of heavily reinforced concrete in an operating automobile plant. The blasting had to be controlled so that vibration limits would not trip computers on operating machines adjacent to the blasting site and would not damage in any way a new computer-controlled machine costing $8,000,000.00 and located within 5 feet of the blasting site. The planning and blasting were successfully completed with no work stoppage and no damage or claims of damage.
UNDERGROUND MINING AND CONSTRUCTION
Ohio - A salt mine had problems with roof control. Precision Blasting Services developed a technology showing that the roof could be stabilized and roof control could be achieved without a great price increase.
Australia - A large underground metal mining operation needed to improve initiation timing for blasting in stopes. Precision Blasting Services worked as a subcontractor to develop a method, which increased timing accuracy.
Ohio- Shaft and tunnel blasting had to be done by a contractor for a Metropolitan Sewer District project. PBS designed all the shaft and tunnel blasts. Some of the blasts were within 50 feet of homes.