Calibrated value of the Rock Factor enabled optimal blast fragmentation to obtain the desired fragmentation of blasted rock mass. The "SB" program uses the calibrated value of the rock factor when simulating blasting and computing specific consumption of energy by the primary crusher where, according to Equation 4, the knowledge of a square ...
Blast fragmentation efficiency prediction can improve blast productivity, but it is capital-intensive when done with available software. Soft computing models based on artificial intelligence approaches and multivariate regression techniques were proposed in this study to predict small-diameter hole blast fragmentation efficiency at the Akoko …
Blasting is an important phase in the fragmentation process of hard rock mining. It constitutes the genesis of rock excavation and the principal element in optimum fragmentation and muckpile profiling. Two main factors, controllable and uncontrollable factors, influence every result or performance of a blast.
Blast Fragmentation Modeling The ore properties and the blast design parameters measured during the audit for the trial blast, were used in the JKMRC blast fragmentation model to predict the ROM fragmentation. …
1. Introduction. Drilling and blasting, as an indispensable method for rock breakage, is extensively employed across diverse engineering domains such as tunnel construction, shaft excavation, and mining operations [1], [2], [3].It is well known that decoupled charge modes are commonly implemented in the mining industry, and the …
Table Source: Wikipedia (Crushers) Cone crushers use a spinning cone that gyrates in the bowl in an eccentric motion to crush the rock between the cone surface, referred to as the mantle, and the crusher bowl liner.Gyratory crushers are very similar to cone crushers, but have a steeper cone slope and a concave bowl surface. As the gap …
Results of blast fragmentation prediction by software Vs image analysis are discussed in this paper. Keywords: Digitised Terrain Models (DTM), Geographical Positioning System (GPS), Geological structures, Image analysis software, Unmanned Aerial Vehicle ... primary crusher is 800 mm. The objective of the study was to improve rock fragmentation ...
6.1 Definition. Optimum rock fragmentation from mining to mineral pro. cessing must meet the following conditions (Zhang 2016a): (1) minimum cost in the size reduction chain: drilling–blast ...
In this paper, the impact of geotechnical ore properties (RQD and UCS) and blast design (powder factor) on the plant throughput and the size-specific energy (SSE) …
q = (D/2)² x 3.14 x P x 1000/1.25 x V². where: D = hole diameter. P = density of explosive inhole. E/V= 1.25. So far, only drilling and blasting have been considered. To find the best size distribution or fragmentation in blasted ore, other costs like loading and haulage costs must also be studied.
Improvement of blast-induced fragmentation and crusher efficiency by means of optimized drilling and blasting in Aitik. ACKNOWLEDGMENTS The thesis project presented in this report was conducted in Boliden's Aitik mine; thereby I wish to gratefully thank Boliden Mines for their financial and technical support. I would like to express my very …
crusher receives the run-of-mine ore after blasting and produces the first reduction in size after mine field blasting. The output of the primary crusher is fed …
Improvement of blast-induced fragmentation and crusher efficiency by means of optimized drilling and blasting in Aitik. ACKNOWLEDGMENTS The thesis project presented in this report was conducted in Boliden's Aitik mine; thereby I wish to gratefully thank Boliden Mines for their financial and technical support.
Drill-blast design parameters have a considerable effect on the degree of post-blast frag-mentation. Bench height, spacing, burden, stemming, bench stiffness ratio and powder …
Following each blast, the much pile dimensions were documented and an optical fragmentation analysis was conducted throughout the excavation of the shot rock. The primary crusher …
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 distributions of ROM, crusher product and Sag mill feed.
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Spending a little extra on drilling and blasting to increase fragmentation will same you multiples ore loading and hauling, then finally crushing.. The Experts: Mining + and Quarry Academy = …
Notable improved rock fragmentation was achieved as a result of accelerated initiation timing using electronic delay detonators. Analysis showed that primary crusher throughput of that section was 18.5 per cent higher when compared to the reference section. Analysis shows that crusher blockages were reduced by 32.5 per …
A well-orchestrated blast, resulting in ideal fragmentation, will substantially affect the productivity and energy consumption of a primary crusher. There are mainly two major aspects of fragmentation which plays a vital role in the success of a primary …
The blasting of rocks using explosives is performed to fragment rocky material into blocks and particles of different sizes. In addition, the sizes of fragments must be smaller than those of the feeding of primary crushing [1,2].Therefore, the optimization of drilling and blasting is essential for controlling ore fragmentation and, consequently, the …
By achieving a suitable and uniform fragment size distribution in blasting, crusher and mill throughput can be increased and energy consumption can be decreased in the size reduction process. Improvement of blast fragmentation decreases machine wears. ... In comparison to the studies reported in the blast fragmentation literature, the ...
3.4. Optimization. After the calibration, the optimal blasting design was chosen for the optimization process in terms of the desired fragmentation, which is a P80 of 0.55 m. To determine the optimal blasting, a total of 6 cases were tested (Table 5). Mining 2022, 2, FOR PEER REVIEW.
Initially the current blast fragmentation needs to be determined (Benchmarked) before any change to the current program is made. The model generated will be calibrated and used to determine what impact any future change (s) will have on the current fragmentation. This will remove a lot of the risk associated with making changes and hoping that ...
Blast fragmentation can be evaluated in terms of fragments' particle sizes and microfractures. ... 2003). The degree of rock fragmentation influences the productivity of excavator and loader, the throughput of crusher and mill, the energy consumption of comminution equipment, and the price of crushed end-products such as the industrial ...
Rock fragmentation is one of the most commonly optimized blasting outcomes due to its significant influence on the efficiency of downstream operations. …
"Quantifying blast fragmentation is useful for measuring blasting performance to determine if the blast has effectively broken the rock mass to enable it to be loaded and that the ore oversize does not exceed the crusher open size. Improved fragmentation and consistent fragmentation across a blast profile will generally …
Many research studies have investigated the impact of fragmentation caused by blasting operations on production performance in the extraction stage. On …
The improved blasting practices and more consistent fragmentation decreased the average number of loads lost each month due to jaw crusher blockages …
The dumpers unload their contents onto a grizzly fitted on the crusher so as to control the size of crusher feed. The size of the opening of the grizzly is 1 m. ... Blast fragmentation size assessment and analysis for production blasts in Indian mining conditions. J Explos Blast Tech 31:459–466. Article Google Scholar Winzer SR, Ritter A ...
The fragmentation results then were paired with the crusher throughput values, and series of regression analysis were done in order to understand the effects of blast fragmentation on crusher throughput. The analysis includes the relationship between P20, P50, P80, and Ptop values of size distributions and the crusher …
