The optimisation of this operation is very important because fragmentation affects the cost of the entire pro-duction cycle of interrelated mining activities, such as loading, hauling, crushing and, to some extent, grinding. However, optimisation of rock fragmentation by drilling and blasting may be understood to mean minimising

However, secondary blasting is the most expensive type of blasting. Appropriate blast design is important in order to lessen the production of over size. Secondary blasting can be done by pop shooting (blockholing) and plaster shooting (mudcapping). Shaped charges are sometime used in secondary blasting, but this is much more expensive. Cast ...

The blasting operation plays a pivotal role in the overall economics of opencast mines. The blasting subsystem affects all the other associated subsystems, i.e. loading, transport, crushing and milling operations. Fragmentation control through

JKTech and Ban Houayxai drill and blast team implemented a joint blast optimisation project since April 2013 to achieve finer fragmentation from fresh ores. This was achieved by modifying the bench geometry, blast patterns and exceptionally high levels of quality control during implementation. Blast

Helping a large copper/zinc mine meet the economic challenge of processing harder ore types. By Walter Valery and Edward Rybinski. Process Technology and Innovation (PTI) has assisted Compañía Minera Antamina to increase mill throughput by integrating and optimizing blast fragmentation, crushing and grinding operations.

of a blast. - The properties of fragmentation, such as size and shape, arc very important information for the optimization of production. Threc fac- tors control the fragment size distribution: the rock structure, thc quantity of explosive and its distribution within thc rock mass. Over the last decadc therc havc bccn conqiderablc advanccs in our

plants regulatory control system and uses methods to optimize set points throughout the plant. ... metal recovery, and optimizing production costs. CONSULTING SERVICES: PRO provides consulting services from drill and blast right through to dewatering. As part of it's fl agship Process ... Fragmentation Optimization Crushing Throughput ...

the ROM fragmentation, while the strength (hardness) affects the generation of fines. Improved plant throughput can be achieved by manipulating ROM fragmentation through optimisation of blasting to reduce top size and increase fines, especially for SAG mills. At Phu Kham, ore domains were defined based on the RQD

Rock Fragmentation Control in Blasting Sang Ho Cho and Katsuhiko Kaneko Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan Rock fragmentation, which is the fragment size distributionof blasted rock material, is used in the miningindustry as an index to estimate the effect of bench blasting.

Blast fragmentation measurements in open pits Posted by John on 31st August 2017 David Varcoe, Principal Mining Engineer of AMC Consultants notes a recent project in which AMC was involved that required, amongst other activities, a review of options to measure blast fragmentation in an operating open pit mining environment.

Integration and Optimisation of Blasting and Comminution Processes S Esen1, D La Rosa2, A Dance3, W Valery4 and A Jankovic5 ABSTRACT This paper presents the methodology for optimising blasting …

The greatest influence on both can be realised through improved fragmentation of the blasted ore and waste within the pit. The measure of the effect of the size distribution of the blasted material was done via: √ Analysis of pictures taken in the pit, after the blast, or from a camera newly installed facing the bowl of the north crusher.

fragmentation plays an important role in order to control and minimize the loading, hauling, and crushing costs. The size distribution analysis of the rock fragmentation by sieving is a direct and accurate method but it is very time consuming and costly. Fragmentation analysis by digital image processing is a low cost and quick method.

of grinding circuits. Overall blast optimization has more recent roots. MacKenzie(1966) reported on costs in iron ore from drilling through crushing. Udy and Thornley (1977) reviewed optimization through crushing. Gold(1987) tabulated and modeled overall mining cost related to blasting at …

Dec 12, 2018· The main controllable variable of the optimization model is the mean fragmentation size which can change from a blast to another by drill and blast design. The relationships among the interrelated mining activities lead to a bathtub curve relation between the total mining cost and rock fragmentation as seen in Fig. 4 .

Break it Better – Mine Blast Fragmentation. ... The DNA-Blast Energy Optimisation Module gives you the opportunity to process either a Far Field or a Near Field Signature hole. Using ... "The Engineering Department started a project to improve fragmentation through blasting and thus increase throughput in the crushing system. It soon became ...

Mar 01, 2019· The recent increase in ammonium nitrate and diesel oil prices have invited many operations in mine to re-examine their drilling and blasting methods to find ways of reducing costs. Under the changed scenario, drilling and blasting companies require to optimize their blasting and costs through a blasting optimization review.

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.

blasting for the mining costs, without consideration to the result further down the production. In this work the optimisation of the blast fragmentation has been aimed at the optimal for the whole process mine and mill, i.e. maximising the throughput. The primary grinding in the mill has been identified as the bottleneck of the production system

optimisation of fragmentation of stone crushing through control.... This page is about optimisation of fragmentation of stone crushing through control blasting, click here to get more infomation about optimisation of fragmentation of ...

Aug 12, 2016· Control and Prediction of Blast Fragmentation and It's effect on the Comminution Process 1. TECHNICAL REPORT Control and Prediction of Blast Fragmentation and its Impact on Comminution JAMES DUNFORD 630024723 Abstract Blasting is a fundamental part of the comminution process in mining.

Tel: +27-798127137; E-mail address: [email protected] Optimization of drilling and blasting operations in an open pit mine—the SOMAIR experience AFENI Thomas Busuyi School of Mining Engineering, Faculty of Engineering and Built Environment, University of the Witwatersrand, Johannesburg, South Africa Abstract: Drilling and blasting play vital ...

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Fragmentation control through effective blast design and its effect on productivity are the challenging tasks for practicing blasting engineer due to inadequate knowledge of actual explosive energy released in the borehole, varying initiation practice in blast design and its …

fragmentation with more damage to the back of the blocks. The work continued to investigate the effect of blast gas on fragmentation by conducting similar tests in blocks but by placing copper pipes in the blast holes to control the gas propagation through the blast zone. Although gas penetration did not

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 …

Wall control blast design and damage control Efficient wall control blast designs should achieve safe and stable slopes while obtaining the required fragmentation. The goal of wall control blasting is to make the transition from well-fragmented rock within the blast to an undamaged slope in as short a distance as possible.

The assessment of fragmentation through blasting and therefore subsequent crushing and grinding stages is important in order to control and optimize the mining operation.