Prediction of Rock Fragmentation in Open Pit Mines
Prediction of Rock Fragmentation in Open Pit Mines, using Neural Network Analysis Kazem Oraee1, Bahareh Asi2 Loading and transport costs constitute up to 50% of the total operational costs in open pit mines. Fragmentation of the rock after blasting is an important determinant of the cost associated with these two components of mine development.
Improving Rock Fragmentation at the Ahafo Gold …
After a statistical analysis of the available data on post-blast fragmentation, it was observed that the desired run of mine (ROM) P80 target of 350 mm is rarely met. It was concluded that the "Kuz-Ram" model used to predict the fragment size distribution is incorrectly applied, which resulted in a planned blast design that produces a coarse fragmentation with an excessive presence of boulders. This is …
(PDF) Rock Fragmentation by Blasting – a review
Rock Fragmentation by Blasting – a review The rock fragmentation process in mining currently being practiced in India needs re-examination to improve the productivity of the mine.
Analysis of blasted rocks fragmentation using …
In this study, which dealt with the amount of fragmentation in Pir Ali limestone mine, the digital image processing method and Split Desktop software that is the most efficient software in this respect were used. Three blocks with different blast patterns were analyzed to study the fragmentation phenomenon and, ultimately, the F20, F50 and F80 and top size values for each block were obtained ...
fragmentation – Mining and Blasting
12.10.2012 · FRAGMENTATION: Primary fragmentation occurs during the detonation phase. The shock waves exceed the compressive and the tensile strength capacity of the rock, and the rock is crushed and pulverized close to the drill hole, and radial cracks will be created out from the hole to a certain extent (equal to 4 – 5 times the hole radius). The gas pressure will penetrate new cracks and existing …
A new framework for evaluation of rock …
Rock fragmentation is a complex dynamic process relating to the interaction between rock mass and explosives. For this reason, a mature model has not yet been developed to meet all mining conditions and geological features (Siddiqui et al., 2009).
Rock Fragmentation by Blasting - Orica
The fragmentation of rock is fundamental to mining. It is the first preparatory stage in the extraction process – making rock small enough and loose enough to be efficiently excavated. But this simple statement underestimates how important this activity is for the whole mining operation. By optimising rock fragmentation by blasting, you can achieve significant improvements in waste productivity, mill …
LIMESTONE ROCK FRAGMENTATION ANALYSIS USING WipFrag
To achieve an optimum rock fragmentation a blast with optimized controllable parameters should be designed so that the effects of the uncontrollable parameters could be minimized. The controllable parameters for optimum fragmentation can be fixed after conduction of trial blasts in a mine and quantification of fragmentation. Quantification of fragmentation refers to the
Measurement of Size Distribution of Blasted Rock Using ...
Optimum rock fragmentation improves the energy efficiency of comminution (Crushing & Grinding) processes and thousands of kilowatt-hours energy per year can also be saved. Blasting is the first step of the size reduction in mining and it is followed by crushing and grinding unit operations.
ROCK FRAGMENTATION - Today at Mines
rock fragmentation course: mngn 407 semester spring 2005 credits: 3.0 hours mining engineering department colorado school of mines golden, colorado instructor: dr. vilem petr [email protected]
Measurement of the fragmentation efficiency of …
Evolution of the fragmentation index vs the powder factor expressed in kilogramme equivalent of ANFO per cubic metre of blasted rock at Reocin Open Pit Mine. 136 ALER et al.: FRAGMENTATION EFFICIENCY 3.5 3.4 3.3 3.2 3.1 3 _~ 2.9 c- 2.8 o 2.7 o "E 2.6 2.5 ~2.4 Y 2,3 2.2 2.1 2 1.9 1.8 -,x f ~/L8 15 / & / _ \ \ 12 m lb 20 3o 40 sb 60 7o 8b 90 100 % Bottom Energy/Total Energy (a) "T x3.5 ~- o ...
Run of Mine – www.zinkgruvanmining.com
Stora Run of Mine: 10 km. Bansträckningen på Stora Run of Mine är 4 km ovan jord och 6 kilometer under jord. Du springer 350 höjdmeter ner i gruvan, och lika långt upp igen! Lilla Run of Mine: 6 km. Lilla Run of Mine har färre höjdmeter och 2 km under jord.
Anti-personnel mine - Wikipedia
Anti-personnel mines are a form of mine designed for use against humans, as opposed to anti-tank mines, which are designed for use against vehicles.Anti-personnel mines may be classified into blast mines or fragmentation mines, the latter may or may not be a bouncing mine.. The mines are often designed to injure, not kill, their victims in order to increase the logistical (mostly medical ...
Controlling fragmentation - Orica
rock is fundamental to getting the benefits out of large production assets. Conclusion #2: Production efficiency and good wall control are critical for the viability of modern mines. Fragmentation control is a key driver of this efficiency and is again included in the Fragmentation control for …
Raj Mathiravedu and Angelo Labriola, Orica, Australia ...
showed a 16% decrease in the 80% passing size for run of mine (ROM) fragmentation from the preconditioned benches, as well as an increase in fines content from 35.4% to 39.0%. Fines content in the SAG feed also increased by 8%. Furthermore, improved and consistent fragmentation has led to a better particle size distribution in the SAG mill
A real-time analysis of rock fragmentation using UAV ...
A real-time analysis of rock fragmentation using UAV technology Bamford 1 2T., Esmaeili K., Schoellig A. P. 1 Lassonde Institute of Mining, University of Toronto, Toronto, Canada 2 University of Toronto Institute for Aerospace Studies, Toronto, Canada Abstract- Accurate measurement of blast-induced rock fragmentation is of great importance for many mining
Optimization of Blasting Parameters in opencast Mines
mines. References Nanda, N.K. (2003), “Optimization of mine production system through operation research techniques”, 19 th World Mining Congress,New Delhi, November, pp.583-595. Pal Roy, P. (2005), “Terms and parameters influencing mine and ground excavations”, Rock blasting effects and operations, pp. 17-22, ii