DigiShot Electronic Detonators Reduce Oversize in Mid

2018-11-12  energy in the blast may reduce oversize, but often these changes result in unacceptable levels of fines and other non-sellable or low margin products. This quarry was forced to make a choice between fines and oversize as to which was the least disruptive to the production process. The decision

New methodology to optimize quarry blasts Pit &

2021-1-13  When we arrived, the blasting was violently cratering, with a violence factor of 4. The material was generating 10 percent oversize, the blasts’ stiffness ratio was 1.0, and the explosive type, initiators and drill diameter could not be changed. The powder

Reducing piles through better blasting Quarry

2012-7-8  Blasting has four objectives: to loosen in-situ rock from a quarry face, reduce block size for processing by crushers, to excavate and load the blast pile and to leave a stable face afterwards. Efficient blasting also reduces fines and oversize and the

(PDF) Reducing a Quarry Global Carbon Footprint

Reducing a Quarry Global Carbon Footprint through Blast Optimization crushing and transport) while bearing in mind the environmental impact of the quarry. This blasting methodology allows to

Toeing the line: Blasting practices to control quarry

2020-1-31  Blasting today is not simply about breaking the rock into manageable pieces, but properly fragmenting and placing that rock to minimise overall quarry costs and environmental effects. • Anthony Konya is the senior project engineer and Dr Calvin J Konya the founder and president of Precision Blasting Services (USA).

Reducing the adverse effects of blasting on the cave

2018-9-19  the future quarry of Gradusa. This paper presents the results of trial blasting and guidelines for reducing the adverse blasting e ff ects on the c ave ecosystem near the future exploitation fi eld Gradusa. These are vibrations and noises, which may have an adv erse impact on the habitats of bats.

Blasting Practices to Control Quarry Floors and

First published in the March 2018 issue of Quarry Management as Tackling Troublesome Toes. By Anthony Konya, senior project engineer, and Dr Calvin J. Konya, founder and president, Precision Blasting Services. The problem of toes and elevated floors after a

GEOTECHNICAL ENGINEERING & BLASTING: AIR

2021-2-15  By reducing the stemming depth the quarry has dramatically reduced the quantity of oversize produced in blast from around 10% to 2%. Water-Deck Techniques In order to reduce costs, most quarries try to maximize the use of ANFO, which is a relatively cheap and highly effective explosive.

Minimizing Quarrying Costs by Correct Shotrock

2016-1-10  Conclusions for Quarry Development •From the total product cost point of view, there is an optimum shotrock fragmentation. •Oversize boulder frequency has a significant impact on capacity and cost. •A smaller drillhole diameter produces fewer fines. In many cases, this is considered waste. •The crushing cost share is almost unchanged

Controlling the Adverse Effects of Blasting

2014-4-3  Controlling the Adverse Effects of Blasting This module addresses the control of offsite impacts that result from blasting, namely: • vibrations, • airblast, and • flyrock. Much of the information in the module is derived from the Surface Mining Control and Reclamation Act of 1977 (SMCRA). The performance standards apply to all

Quarry Dyno Nobel

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

Power of analytics in improving rock fragmentation

Further, by reducing oversize material from blasting, ease of excavation and hauling is achieved thus minimizing cost. Primarily, fragmentation optimization is achieved by; improving distribution of explosives, increasing amount of explosives per unit rock, and enhancing shock energy delivered by the explosives by increasing its density and

Minimizing Quarrying Costs by Correct Shotrock

2016-1-10  Conclusions for Quarry Development •From the total product cost point of view, there is an optimum shotrock fragmentation. •Oversize boulder frequency has a significant impact on capacity and cost. •A smaller drillhole diameter produces fewer fines. In many cases, this is considered waste. •The crushing cost share is almost unchanged

Controlling the Adverse Effects of Blasting

2014-4-3  Controlling the Adverse Effects of Blasting This module addresses the control of offsite impacts that result from blasting, namely: • vibrations, • airblast, and • flyrock. Much of the information in the module is derived from the Surface Mining Control and Reclamation Act of 1977 (SMCRA). The performance standards apply to all

Case Study Improving Crusher Throughput from

2012-8-23  Quarry management identified that the site was experiencing oversize in the blasted Dolerite muck-pile, which was affecting production rates and increasing their cost for secondary breakage. The Situation As Dolerite is one of the hardest rock mass to blast, the site was experiencing excessive amounts of oversize.

Technology Lets Blasters Load Precise Rounds E & MJ

2020-4-8  “Blasting and explosives is a very specialized field, and BlastWeb will allow researchers to do a range of tests using the system,” said Cawood. thus reducing oversize and/or fines. Dyno Nobel recently conducted a trial shot using its Δ E at a quarry in the Laurentian region of Quebec, Canada. The quarry used a 1070G blend-like

Nitro Sibir Australia Blasting Services Case Study

2019-11-21  A mid sized quarry (+200 kT) in the Pilbara was experiencing difficulties in sourcing appropriate explosives and blasting services. NSA was contacted by a drilling contractor in June 2017 for pricing on bulk explosives supply and blasting Solution: or engaged NSA for an initial trial, providing 2 weeks’ notice of the requirement

Quarry Orica Mining Services

2011-8-17  8 ORICA QUARRY SERVICES QUARRY 9 The Centra™ Bulk System is a range of high energy, water resistant, pumped emulsion blends designed for small diameter use in quarrying blasting applications. Manufactured and delivered with precise control, the high on

A Perfect Partnership Agg-Net

Thrislington Quarry. Lafarge’s Thrislington Quarry was opened in 1954 to extract magnesian limestone from an area near Ferryhill. The quarry, which covers an area of 112ha, plays an important role in mineral supply in Co. Durham and about a third of the limestone extracted from the site is a high-grade variety (known as industrial dolomite).

Caterpillar’s solid rock breaker Aggregates Business

2021-2-26  The quarry is owned and operated by local company Donskoy Kamen, while a sub-contractor, Yugvzrivprom, performs the blasting work. Donskoy Kamen, familiar with the performance of the DP1500i after a successful demonstration on granite, had experienced problems with its existing fleet of drill rigs on the sandstone at the quarry.

Minimizing Quarrying Costs by Correct Shotrock

2016-1-10  Conclusions for Quarry Development •From the total product cost point of view, there is an optimum shotrock fragmentation. •Oversize boulder frequency has a significant impact on capacity and cost. •A smaller drillhole diameter produces fewer fines. In many cases, this is considered waste. •The crushing cost share is almost unchanged

MARTINS CREEK QUARRY EXTENSION PROJECT

MARTINS CREEK QUARRY EXTENSION PROJECT BLASTING AND VIBRATION FOR EIS REPORT NOVEBER 2015 5 5 13. Vertical Energy Distribution = percentage of bench loaded with explosives = (11 2.6)/11 = 76.4% which is very good and thus the blast has the best chance of minimising oversize at the top of the shot 14.

Quarry Focus Stemtite

1997-10-30  Improved energy containment permits a higher explosive column, reducing the required stemming height by up to 35% over conventional practices. Oversize in the top section of a blast is drastically reduced as a result. A higher face velocity is acheived with the

HSE Quarries Safe operation and use of mobile jaw

2021-2-27  Working on the premise that prevention is better than cure, every effort should be made to prevent oversize material or tramp metal entering into the crusher feed hopper by: Designing any quarry blast to achieve optimum rock fragmentation (quarrying)

Quarries Orica

The number of blast delays is also reduced, improving quarry productivity; The quarry having increased confidence in meeting production targets; Features of our Offer: Bulk Systems Broadest range of bulk systems as seen in the EnergyMap™ uni tronic™ 600 Electronic Blasting System for precise control and on-bench testability

Optimization of Blasting Parameters in opencast Mines

2012-7-5  National Institute of Technology Rourkela This is to certify that the thesis entitled “ Optimization of Blasting Parameters in Opencast Mines ” submitted by Sri Manmit Rout (Roll. No.: 10305019) and Sri Chinmay Kumar Parida (Roll. No.: 10305017), in fulfillment of the requirements for the award of Bachelor of

Technology Lets Blasters Load Precise Rounds E & MJ

2020-4-8  “Blasting and explosives is a very specialized field, and BlastWeb will allow researchers to do a range of tests using the system,” said Cawood. thus reducing oversize and/or fines. Dyno Nobel recently conducted a trial shot using its Δ E at a quarry in the Laurentian region of Quebec, Canada. The quarry used a 1070G blend-like

NEW EFFECTIVE AND ECOLLOGICALLY FRINEDLY

2007-3-3  Reducing the quantity and cost of explosives for demolition of a 1m3 rock piece by over 50% ; Decreasing, by over 50%, the toxic gas emissions resulting from demolition of oversize rock; Eliminating flying rock and largely minimizing the air blast in the blasting field;

Th risl ngto Qua y agg-net

2020-2-28  and blasting costs, as the cost of the crushing operation is then fixed and the quality of the blast is no longer a variable that affects it. This is a very short-term view and often results in increased costs, not only for the crushing contractor, but also for the quarry owner. Safety in a quarry

Nitro Sibir Australia Blasting Services Case Study

2019-11-21  A mid sized quarry (+200 kT) in the Pilbara was experiencing difficulties in sourcing appropriate explosives and blasting services. NSA was contacted by a drilling contractor in June 2017 for pricing on bulk explosives supply and blasting Solution: or engaged NSA for an initial trial, providing 2 weeks’ notice of the requirement