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porosity. In the studied mine site, the particle size distribution in the dump leach pad was determined by analyzing aerial images of multiple dump faces taken by a drone. Particles spanned a wide range in size from less than 2 cm in diameter to larger than 2 m in diameter, with a P 80 to be 2 m.
Jun 29, 2020· As a result of the measurement of particle size distribution in the pile which is stated to have a particle size between 3 and 4 inches (76.2–101.6 mm), the sieve opening (D80) through which 80% of the particles passed was measured as 151 mm and the sieve opening (D50) through which 50% passed was measured as 106 mm.
Nov 13, 2015· optimisation of value is the removal of waste from the run of mine production. The scale of mining in this industry and distribution of PGM's permit the effective economic application of rock by rock sorting. An initial programme of bulk sample testing through a single commercial scale sorting unit
nature of run of mine ore ... where the emphasis is on breakage and size distribution effects, which best captures the most common understanding of M2M. ... (2004). WipFrag Supplied by WipWare ...
2. Size Distribution Analysis Using Digital Image Processing Measurement of fragment size of blasted rock is considerably important in order to evaluate the efficiency of the production blasting operation. There are several methods of size distribution measurement and fall under two broad categories; direct method and indirect methods.
Jan 01, 2020· The ore feed size may in some cases be inferred by applying parameter estimation to operational data (Olivier et al., 2012), but a more direct approach is to monitor images of the feed and inferring the size distribution using computer vision. ethods exist that calculate the size distribution from input images, see e.g. Zhang et al. (2013) and ...
size distribution. The method was tested in Dongri Buzurg open-pit manganese mine of Maharashtra (India). WipFrag software was found to be useful for fragmentation analysis of blast fragment sizes in very short interval of time. Keywords:-WipFrag, Fragmentation, Blasting, Uniformity Coefficient, Coefficient of Gradation.
the coarse part, and the Kuz ̶Ram model predicts the size distribution of this part. Compressive fracturing in the crushed zone, for which the Rosin ̶Rammler function gets a different value of n and XC, produces the fine part. In the TCM model, two Rosin ̶Rammler functions are used to predict the run of the mine size distribution.
Mar 13, 2021· Among these, Split Desktop, WipFrag, FragScan, and GoldSize are the most common software packages based on 2D image processing for performing size distribution analysis of blasted rock blocks (Aswegen and Cunningham 1986; Maerz and Zhou 1998). The most common method of quantifying fragmentation is the mean fragment size (X 50). It is the screen ...
in size from microns to meters. Even though sieve analysis offers a high degree of precision and accuracy within the sample, the sample size is traditionally very small making the results much less representative. In 1987 the WipFrag photoanalysis system was developed to characterize the size distribution of blasted material.
The WipFrag System (figure 2), first proposed in 1987 [2] and commercialized in 1996 [3], was initially used primarily to characterize the size distribution of muck piles.
Wimmer, M, Ouchterlony, F & Moser, P 2008, 'The fragment size distribution of Kiruna magnetite, from model-scale to run of the mine', in H Schunnesson & E Nordlund (eds), Proceedings of the 5th International Conference and Exhibition on Mass Mining, Luleå University of …
4.8 Cumulative size distribution of sample 4 17 4.9 Photograph of rock pile sample 5 18 4.10 Cumulative size distribution of sample 5 18 4.11 ... To analyze the fragmentation characteristics of the blasted muck of a limestone mine using the WipFrag image analysis system. To obtain the optimum size distribution of the sample. ...
Run of Mine Particle Size Distribution Operational Envelope Size Fraction Figure 3: ROM PSD Operational Envelope. Black line is the ROM PSD component used to determine the tailings discharge used by NIWA for the modelling of tailings plume. Size 10000 2000 1000 710 500 355 250 212 150 125 106 90 63 45 38 31 16 Max 100.00
Photogrammetry techniques have been found useful in evaluating grain size distribution of the run-of-mine material in both surface and underground mining [9,10].
The University of Queensland's institutional repository, UQ eSpace, aims to create global visibility and accessibility of UQ's scholarly research.
May 01, 1984· Universal size distribution of run-of-mine bituminous coals in the Eastern USA Robert Frumerman and Charles Baetens Frumerman Associates Inc.. Consulting Chemical Engineers, 218 South Trenton Avenue, Pittsburgh, PA 15221, USA (Received 28 June 1983) The economic and environmental penalties resulting from the breakage of coal into fines makes it desirable to …
Composite fragment size distribution curve for blast (a) SD-1 to SD-10 in Mine-A. Delay timing between rows vs Drop 6 5 4 3 2 Drop, (m) 1 Delay timing between rows vs MFS 0 0.5 MFS, (m) 0 Delay ming (ms/m of Burden), ms (b) Delay timing between rows vs Spread 60 Delay ming (ms/m of Burden), ms 50
Estimation of particle size distribution: Run-of-mine waste rock and primary crusher products [Lapakko, Kim] on . *FREE* shipping on qualifying offers. Estimation of particle size distribution: Run-of-mine waste rock and primary crusher products
The particle size distribution obtained from Microsoft-paint imaging analysis shows that the mean run-off-mine sizes are 0.6, 0.58, 0.42, 0.36 and 0.54 m, and the average boulder sizes of fragmented particles are 1.19, 1.11, 0.93, 0.81 and 1.03 m, for blast test 1, blast test 2, blast test 3, blast test 4 and blast test 5 respectively.
Stemming material size = D/10 to D/20 (Angular material with minimum fines) Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting
The results of the fragment size distribution obtained from Kuz-Ram significantly vary with that of the WipFrag but follow the same trend. The three results from WipFrag are in a very close range.
Distribution Analysis of Rock Fragments Size Based on the Digital Image Processing and the Kuz-Ram Model Cas of Jebel Medjounes Quarry. Mohamed F 1,2 *, Riadh B 2, Abderazzak S 1,2, Radouane N 3, Mohamed S 2 and Ibsa T 2. 1 Laboratory Natural Resources and Planning, Algeria. 2 Faculty of technology, Algeria. 3 Faculty of Earth Science, Algeria *Corresponding author: Mohamed F, …
Al-Thyabat and Miles, (2006) used image processing for size distribution of limited number of coal particles in the size range from 3.35 to 45.0 mm (627 particles) including other mineral ores. ...
Feb 06, 2020· Kuz-Ram versus WipFrag size distribution curves for blast A, B and C. Table 3. ... [Show full abstract] quarry operators wish to blast and deliver the run-off-mine (ROM) to the processing plant at ...
Mets can look at amount of grinding media and size. Liner and lifter pattern. Operating team should look at crushing and screening options. e.g.: No good crushing 1000 tph delivering o-size non quality material to a mill that grinds 150 tph. Crush a quality 300 tph to give the mills every opportunity to maintain max tonnage with the required grind.
Jun 08, 2016· Size by Size Particle Size Distribution Profile & Flotation Recovery Results. The unseen factors in flotation are those which affect the economic recovery and are not shown by the assays or analyses. The fact that equal tailings and equal grade of concentrates can be produced with widely varying physical properties of the products recovered and ...
Joint effect of commodity price and geological uncertainty over the life of mine and ultimate pit limit . By Roussos Dimitrakopoulos. M Dean FMC 2015-By Munirud Dean. A review of cut-off grade policy models for open pit mining operations. By Iván Cárcamo.