Search case studies related to quarry mining.
Better Fragmentation, Blast Consistency and Expanded Pattern with DigiShot® Detonators
Dyno Nobel proposed a solution using DigiShot® electronic detonators to decrease oversize, fines and tight digging. The solution included less holes, less powder and higher powder factors. A drone video was taken to study movement and lift of blast.
Comparison of Fragmentation Results by Varying Time Between Top and Bottom Primers
Study conducted to find optimal delay timing for this granite quarry
DIFFERENTIAL ENERGY® Applied to Improve Fragmentation
Optimising fragmentation to improve downstream operations
DIFFERENTIAL ENERGY® Technology Improves Fragmentation by 52.7%
Using an optimization study that covered a 20-month period in 2014 and 2015, the client found a high percentage of fines in the blasted stone. The client called in DynoConsult® to help study the reasons and find a cost effective solution.
DynoConsult Assists in Permit Change
DigiShot Electronic detonators, signature hole analysis provides means to achieve goal of zero increased impact to community regardless of shot size.
Electronic Detonator Precision and SHA Provide New Alternatives for Pipeline Construction
Inconsistent breakage & complaints from vibration off the blast events motivate two Indiana limestone quarry customers to convert from detonating cord and slider cast boosters to DigiShot® electronics and Spartan® cast boosters.
Electronic Detonators Allow Quarry to Increase Production While Keeping the Neighbors Happy
By using Signature Hole Analysis modeling to develop alternative timing sequences, Dyno Nobel was able to increase the blast hole diameter allowing for pattern expansion and an increase in blast rock per hole. Pattern expansion resulted in lower drilling costs, and timing sequences kept vibration levels low, while enabling the quarry to increase production per blast event while ensuring minimal off-site ground vibration to satisfy the local market demand for stone.
Electronic Initiation and Waveform Analysis Improve Off-Site Blasting Effects
Electronic initiation systems provide accurate delay timing for today’s demanding blasting applications. Electronics also provide the explosive engineer with the ability to program precise delay times to further improve blast performance including reduced peak particle velocity (PPV) and increased frequencies (Hz) which minimizes ground vibration.
Expansion of Quarry Using TITAN® 1000 LD and DigiShot® Plus
Surrounded by numerous communities, the Graymont Marbleton Quarry was looking to expand its quarry number six.
Minimizing Off Site Blast Effects
By using site-specific seismic modeling that determined optimum firing sequences on a shot by shot basis, off-site vibration effects were minimized and additional gains in overall blast efficiency led to better fragmentation, faster truck cycle times, reduced oversize, increased pattern geometry, elimination of decking and the ability to increase shot size.
Reduced Protection in Blasting Due to Better Control of Loading
DynoConsult was called in to determine best course of action for resuming operations.
Reducing Costs of Retrieving Low Alkali Aggregates in NY Quarry
The project scope was to segregate and remove a high alkali chemistry area, post one bench blast event, leaving good quality aggregate material for cement production.
Reducing Neighbour Complaints from Blasts
The quarry manager agreed to shooting a shot with solid column eliminating the deck and speeding up face and row time.
Reducing Regulatory Community and Liability Exposure with DigiShot® and Waveform Anlaysis
Taking advantage of the flexibility and precision of the DigiShot® electronic initiation system and using alternative timing sequences designed through signature waveform analysis, one northeast U.S.A. quarry operator was able to reduce peak particle velocity values by over 50%. Reductions in ground vibration were realised without the loss of productivity, blast size, or fragmentation.
Sub-drill Reduction to Aid in Vibration Control
In July of 2016, at a granite quarry in the Southeast United States, current drill patterns were a 13x13 with 3’ of subdrill using a 5.75” blast hole. The average pounds per hole was 598. The seismograph, measuring vibration, is located within 700ft from the blast. SHA (Signature Hole Analysis) was being utilized to delay shots.
Sub-drill Reduction to Aid in Vibration Control
DYNO 42 software was used to come up with the delay that produces the best simulated peak particle velocity and frequency.
Tight Timetable to Clear Area for Primary Crusher
Tools and technology used at this mine to ensure a successful blast with minimal vibration.
TITAN XL 1000 Yields Excellent Results
Many of the quarries are located very close to populated areas. The primary mineral deposits in this region is limestone and much of it is well laminated with a significant amount of cracks and seams in the formations.
Understanding Blast Hole Explosive Column Rise using TITAN Gassing Technology
By utilizing the TITAN Calculator, blasters can visually see what the expected bore hole rise will be based on hole depth and density. Based on this technology a load sheet was created and provided to the operator so that he could actually load the hole based on pounds required verses collar height.
Use of Dyno Nobel Blast Design, DigiShot® Detonators and DYNOSPLIT® C
This Northeast aggregate quarry typically blasts using 6.5” holes on a large pattern for their aggregate needs. Future plans include moving the primary crusher from the current location into the pit. This would require a clean final wall for traffic safety.
Use of Electronic Detonators to Reduce Boulders and Fines
In-depth analysis of quarry operations and introduction of electronic detonators.