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the effect on fragmentation and overall blast performance Fragmentation analysis of the blasted muckpile Throughput rate of the crushing plant by means of a time study Power consumption of the primary crusher, using the Bond Work Index and applying this to the blasted material. Owing to time constraints, the results of
Aug 09, 2010 2004. Post-Muckpile, Pre-Primary Crusher, Automated Optical Blast Fragmentation Sizing. Fragblast Vol. 8, No. 2, pp. 119-136.
size distribution of ROM fragmentation is obtained from the images of blasted muckpiles. In hard and massive rock blasting the surface of the muckpile is usually coarser because the rocks in this zone are usually generated from the stemming region and from the front row containing back break Figure 2. Coarse zone fragment Figure 2.
4.9 Computer based fragmentation models 44 4.10 Summary of fragmentation model information 46 5. Fragmentation size distribution changes in practice 49 5.1 General experiences 49 5.2 Effects of air-decks and stem plugs 52 5.2.1 Air-decks 52 5.2.2 Stem plugs 53 5.2.3 Summary 54 5.3 Tests of influence of borehole pressure and explosive 54
detonation of emulsion explosives on fragmentation of blasted muckpile over a range of densities. The den-sity of explosives was varied from 0.6 to 1.1 gcc which resulted in the variation of detonation velocity from 3262 to 4624 ms. Keywords Blasted muckpile,
blast fragmentation using the Kuz-Ram model, an empirical fragmentation model suggested by Cunningham. The purpose of this study is to develop an empirical model to relate specific explosives energy ESE to blasting fragmentation reduction ratio RR and rock fracture toughness KIC.
A decrease in fuel usage by face excavators or front-end loaders also indicates improved fragmentation, as does increased crusher throughput and percentage of split materials scalped off at the primary crusher or oversize in the muckpile. Results from all these KPIs help us to make the correct decisions for future blast designs.
Jan 12, 2021 Cutting-edge approach to achieve the perfect ton. After a shot is executed, data on the fragmentation, muckpile shape, vibration and noise can automatically be integrated to allow AI to refine its models for use in the next drill-shot plan. Photo PicsguruiStock Getty Images PlusGetty Images.
- fragmentation - muckpile shape and digability - damage - downstream handling and processing - environmental impact - cost. Fragmentation assessment. Based on desired size, amount of fines and oversize Production statistics that depends on fragmentation - secondary breakage - crusher throughput - judgmental rating of digability from operator ...
fragmentation independent studies showed 130 time reduction in stemming movement 27 reduction in average rock size greater tonnage at primary crusher patent 5,936,187 gear-up for improved blast performance, fly rock control, savings in secondary breakage and down stream costs. use the plugs with the patented gear design
fragmentation resulting from the blasting. The particle size distribution of each blast was obtained, and the mean fragment size correlated with the blast design parameters. The percentage cumulative passing for gyratory crusher with the feed size of 1500 mm ranges between 92.8 to 100. The
Fragmentation Analysis. It is well documented that size distribution, swell factor or heave, and the material hardnessabrasiveness have a distinct impact on
Sep 01, 2011 Break it Better Mine Blast Fragmentation. Jack Eloranta of Eloranta amp Associates stresses the importance of timing a blast properly. It may take days or weeks to drill out a pattern and loading might take hours or days. But, the time span that really matters is the interval from the detonation of one hole to the time the adjacent hole fires.
fragmentation, muckpile profile was of dome shape and in case of finer fragmentation muckpile profile was spread over large area 21. This may be due to the inertia and interlocking effect of the coarse fragments. 2. OBJECTIVE The main objective of research study was to investigate the ...
of secondary breaking. Muckpile percentage below the crusher critical size 1,000 mm was increased by 10 and the optimum size 600 mm by 15. Figure 5 - Paradigm timing optimization for best fragmentation Figure 4 -Theoretical damage model for ESTAR timing - minimizing delay scatter Figure 3 - Theoretical damage model
Feb 05, 2018 Changes in fragmentation and breakage characteristics of the feed are sometimes difficult to observe and consequently, difficult to control. ... These blockages can damage the crusher and take time to clear, resulting in a serious bottleneck for the entire process. ... After blasting, an unusual quantity of oversized ore is found in the muckpile.
fragmentation data from an online system. The results can show a number of different things, but most importantly it tells the operator either a The crusher needs to be gapped on a more regular basis based on the increased fragmentation size bThe crusher is being gapped too often when it is not required, allowing for less downtime.
HxGN Split-ShovelCam monitors shovels, conveyor belts and truck tips into the primary crusher in real time to deliver the key metric of particle size, quantifying post-blast fragmentation. HxGN Split-Desktop delivers manual, off-line coarse rock fragmentation size analysis of muck piles, leach pads and more.
Jun 07, 2021 Fragmentation Size Distribution Should Match the Optimal Feed Distribution of the Crusher So what you need to do is determine what your current size distribution is and then running a continuous improvement cycle to adjust drill and blast parameters, measure changes and work towards where the two distributions match each other as close as possible.
Apr 05, 2018 After blasting, an unusual quantity of oversized aggregates is found in the muckpile. quote-AR-W300-Q The primary crusher is a vital part of the extractive process Solution Even though aggregate types can appear to be similar, only the details from a true drill and blast program can eliminate guess work. A trained geologist with local ...
K00r Degree of fragmentation txcenent Figure 1. Blast fragment optimization. or expenditure possible. The efficiency of any mining operation depends on the fragmentation of the muckpile produced. Rock fragmentation has been the subject of many studies as it is the most important aspect of produc tion blasting, since it affects the cost of ...
The statement blasting is the first crusher, is well known and it is expected that resulting fragmentation has an effect upon downstream operations and, particularly, primary crushing. After the very encouraging results of the Blast-Control ECC-funded project, Lafarge-Granulats, the largest aggregate producer in France, accepted
RQD of monzonite in blast 760043 Fragmentation photographs were taken at the post blast muckpiles, at the back of trucks, at the crusher product conveyor and at the sag mill feed conveyor. The images were processed using the Split system to obtain the size
Apr 09, 2018 The experimental work was carried out in the quarry El Aljibe. The quarry is located in central Spain near the town of Almonacid de Toledo and mines mylonite to produce track ballast for high-speed and conventional trains 3256 mm fraction, for high strength concrete and asphalt mixtures 612 mm fraction, and for sub-base and base courses 025 mm fraction in road and rail track construction.
Get on the path to understanding what is happening at the muckpile. Rock fragmentation from different blast designs can be evaluated to help optimize blasting. Understand the Crusher Performance and the Feed to the Circuit Measure the feed variability and correlate to crusher throughput and reduction ratios.
muckpile. Therefore, reliable evaluation of fragmentation is a critical mining problem1. Production of finer fragments in blasting operation reduces the work-load of primary crushers therefore increasing the crusher efficiency and reducing the crushing cost. Also crushing rate per hour will increase. 2.
was from photos taken of areas in the blast muckpile. An alternate and more representative method is to take photos as the loads are dumped into the crusher. A more general and manual alternative to commercial fragmentation analysis packages to analyze muck pile photos described in the paper A Blasters Tool to Measure Fragmentation 2008.
FRAGMENTATION The key objective is to deliver a product that is broken well enough to maximise crusher throughput. That positions fragmentation as the main in uence to performance of downstream activities in a mine. As a consequence, the pro t of a mining operation can be greatly improved through optimised fragmentation.
Notable improved rock fragmentation was achieved as a result of accelerated initiation timing using Uni tronicTM detonators. Analysis showed that primary crusher throughput of the Uni tronicTM section was 18.5 higher when compared to the standard non electric section. Analysis also showed that crusher
WipFrag 4 Image Analysis Software allows instant PSD analysis of digital images collected at the muckpile after a blast, a closer up sample of a stockpile, a laboratory sample or even droneUAV images. With auto-scaling capabilities, WipFrag 4 is safe, cost effective and the most accurate fragmentation analysis tool in the world.
Feb 01, 2007 The Vari-Stem plug trials at Rich Hill Quarry resulted in performance benefits in terms of improved fragmentation and increased primary crusher productivity. The findings provide evidence of the benefits of stemming plugs for improved blast performance, as represented by a 27 per cent decrease in the mean size of rock in the post-blast muck ...
Managing Muckpile Fragmentation Scott G. Giltner. Topics to be Covered ... Does the muckpile flow during digging Do the haul trucks dump at the crusher without delay Is the throughput and power draw of the crusher consistent Is secondary breakage required on a regular basis
Managing Muckpile Fragmentation Workshop Scott G. Giltner. Outline Review of factors affecting fragmentation Burden amp Spacing Powder factor Delay time amp accuracy Fragmentation modeling. Comminution or Breakage 60 80 100 Cum passing In-situ ROM Crusher Product 10000 0 20 40 0.1 1 10 100 1000Size mm. Fragmentation Parameters Joint Spacing ...
Sep 21, 2021 The muckpile is then loaded into trucks by hydraulic shovels, and then, the muckpile is transported to two different jaw crushers for the primary crushing operation. The output fragments of the jaw crushers are then fed to conical crushers and