the major partBlasting stepped up to the plate with
their technical resources and offered
to shoot this blast using electronic
detonators to better control air blast
and vibration while maintaining or
improving fragmentation … On June 4,
2009, Maine Drilling & Blasting
electronically detonated 56,000 tons of
rock in the Dracut Quarry without
incident or any neighborhood
complaints. The fragmentation was
very good and is one of the best
digging shots we have had.”

Bill Thompson
Site & Production Manager
P.J. Keating - Dracut Plant


 Jointa Galusha Quarry, NY

 

the major partBlasting produced a massive blast
under very tight conditions, resulting
in the acceleration of our new asphalt
plant construction timetable by a full
month. Not only was our crusher and
existing asphalt plant 85 feet from the
blast not damaged in any way, but the
resulting electronic detonator shot
produced just under 130,000 tons of
almost 100% crushable rock that
reduced our down stream costs by
more than 30%. The shot was one of
the easiest digging shots that went
through our plant on the first pass,
saving us tremendous time.”

Robert Norkiewicz
Plant Manager
Brox Industries

 

P.J. Keating Quarry, Dracut, MA

SCOPE OF WORK:
In order to square one side of this small, demographically-limited quarry, a much larger cut than usual was needed - more than double the size of an average shot of between 14,000 to 24,000 tons. 

CHALLENGE:
Neighborhood issues existed with noise and vibration on shots of average size. MD&B chose to employ Electronic Detonators to provide advanced control over air blast and vibration without sacrificing, and with an eye to bettering, breakage.

OUTCOME:
56,000 tons were successfully shot in one blast, the largest ever in the quarry. There were no complaints from surrounding neighbors, and breakage was improved.

 

Jointa Galusha Quarry, Glens Falls, NY

SCOPE OF WORK: Drilling and blasting an area of quarry that had not seen activity in quite some time within 600 feet of a museum housing a priceless art collection - some of the most valuable art in the world. 

CHALLENGE: To drill and blast under vibration levels acceptable in the museum/historical building environment without sacrificing quarry production or fragmentation. A program was implemented to modify blast design, verify with bore track and laser profiling, and introduce Electronic Detonators. 

OUTCOME: Blasting proceeded through the closest point to The Hyde without incident. Both the Facility Manager of The Hyde Collection and the Interim Director at the time were very pleased. Jointa Galusha noted improved production and requested continued use of Electronic Detonators even after work moved away from The Hyde. Closely following that decision came Jointa's request to have Maine Drilling & Blasting also implement Electronic Detonators at their new quarry in Hartford, NY.

Read the PRESS RELEASE (PDF)
Read the NORTH AMERICAN QUARRY NEWS article (PDF)

Brox Industries Quarry, Dracut, MA

SCOPE OF WORK: Quarry reserves running low, necessitated shooting, in total, at least 600,000 tons in close proximity to several structures. 

CHALLENGE: The area was right next to a new $15 million crusher complex. To further complicate the blast plan, an asphalt plant sat 225' directly behind the last shot, with a 20,000-gallon fuel oil storage tank. In a 225' radius, there was $20,000,000 in structures that could not be moved. MD&B chose to employ Electronic Detonators to provide advanced control over muck pile displacement, as well as for vibration and air blast due to the size of the blast, which utilized 70,000 pounds of explosives. 

OUTCOME: Post-blast there were just under 130,000 tons on the ground, almost 100% crushable. There was no flyrock damage to the crusher or vibration damage to the asphalt plant. All of the seismographs were well within limits, and there were no complaints from area residents. Quarry management could not have been more pleased with the process and end result. Brox Industries in Dracut has since insisted upon Electronic Detonators for all shots critical in either vibration or proximity situations.

Read the NORTH AMERICAN QUARRY NEWS article (PDF)

 

 
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