run of mine rock fragmentation

  • Utilization of Waste Rock from Oil Shale MiningRock fragmentation control in opencast blasting

    fragmentation Run of mine the rock received from a mine before processing such as crushing or grinding includes oil shale and waste rock Trade oil shale oil shale used for final consumption WA water absorption of aggregateRock fragmentation distribution influences a range of mining and milling processes including load and haul rates crushing and grinding performance and ore recovery in beneficiation processes Michaud et al In opencast mining where blasting is employed for excavation the overall cost effectiveness of the production operations is

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  • Juliana Colacioppo s research worksBlasting and Explosives Quick Reference Guide

    Typically a PIO project starts with a site visit to perform blasting and process audits collect high quality data including measurements of run of mine fragmentation and survey data around all Burden stiffness ratio = BH/B 2 to 35 good fragmentation >35 very good fragmentation Stemming material size = D/10 to D/20 Angular material with minimum fines Presplit blasting Spacing = Hole diameter x 12 Burden = 05 x production blast burden B Uncharged length at top = 10 x D Powder factor = 05kg per square metre of face

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  • AGGREGATE SIZING AND SHAPE DETERMINATION USING The Kuz Ram fragmentation model 20 years on

    AGGREGATE SIZING AND SHAPE DETERMINATION USING DIGITAL IMAGE PROCESSING N H MAERZ Rock Mechanics and Explosives Research Center University of Missouri Rolla Abstract Aggregate size and shape measurements are increasingly becoming important issues in the mining comminution materials handling and construction industrirock and there are significant rewards for deliver as it is limited in scale requires long run times and suffers from the difficulty of collecting adequate data about the detonation the rock and The Kuz Ram fragmentation model 20 years on CVB Cunningham African

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  • Prediction of Rock Fragmentation in Open Pit MinesDoctor of Philosophy ResearchGate

    Fragmentation of the rock after blasting is an important determinant of the cost associated with these two components of mine development In this paper fragmentation of the rock after blasting is estimated analytically by the use of neural network methodThis paper reviews the blast fragmentation models developed to date and discusses the effects of the run of mine ROM fragmentation on the comminution circuits explosives in rock blasting is

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  • Down the hole drill WikipediaEFFECT OF EXPLOSIVE ON FRAGMENTATION

    A down the hole drill usually called DTH by most professionals is basically a mini jackhammer screwed on the bottom of a drill string The fast hammer action breaks hard rock into small flakes and dust and is blown clear by the air exhaust from the DTH hammer The DTH hammer is one of the fastest ways to drill hard rockSPLIT is an image processing program for determining the size distribution of rock fragments at various stages of rock breaking in the mining and processing of mineral resourc The desktop version of SPLIT refers to the user assisted version of the program that can be run by mine engineers or technicians at on site locations

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  • Case Study Improving Cap Rock Fragmentation and Critical Comparison of Julius Kruttschnitt Mineral

    Case Study Improving Cap Rock Fragmentation and Vibration Management Open Cut Iron Ore Mine the generation of oversize in the cap rock Various models were run using the current designs and they Case Study Improving Cap Rock Fragmentation and Vibration Management Open Cut Iron Ore Mine AustraliaAug 09 32 Blast fragmentation can have a significant impact on the profitability of a mine An optimum run of mine ROM size distribution is required to maximise the performance of downstream process If this fragmentation size distribution can be modelled and controlled the operation will have made a significant advancement towards improving its performance

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  • Matthew Thurley Principal Scientist Innovative Machine MODELLING FINES IN BLAST FRAGMENTATION AND ITS

    Image analysis as a technique for fragmentation measurement of rock piles has been the subject of research since the ’s and to date run of mine ROM fragmentation optimisation studies have The run of mine ROM fragmentation is one unit of rock mass is defined as the volumetric count and can be estimated from a joint count made within a window defined on the face In the case of

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  • run of mine rock fragmentation thedugongcozaOverview of mine scheduling for Oyu Tolgoi Underground

    Improve Milling Through Better Powder Distribution Eloranta of fragmentation based on the distribution and level of blast energy pointed to a pre conditioning phenomenon resulting from the rock s then referenced to actual costs which are matched to sizing from video images of run of mine rock Overview of mine scheduling for Oyu Tolgoi Underground Project S Fowke and B Groeneveld Caving Vancouver Canada While the overall rock mass strength is fair the highly fractured nature of the orebody in addition to the

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  • WipFrag System II Online Fragmentation AnalysisAppendix E6 Canadaca

    At INCO s Coleman mine a large study using WipFrag resulted in a 40 pattern expansion twice as good fragmentation and considerable reduction of oversize12 33 Highland Valley Copper Logan Lake B C Canada grinding mill performance Highland Valley Copper is using on line monitoring of ore size and combining it with ore hardnessin the Mitchell pit SABREX simulations were run on various pattern sizes from 75m to 9m square equivalent and the resulting fragmentation analyzed The results show that an 85m x 85m pattern should be used with a powder factor of 096kg/m3 At an average rock density of 277 tonnes/m3 this equates to a powder factor of 035 kg/tonne This

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  • ANFO Mining and BlastingAppendix E6 Canadaca

    May 14 32 When two shock waves meet each other the final pressure is greater than the sum of the initial two pressur Stress analysis indicates that this should be favorable to rock fracture and fragmentation in blasting Double primer placement was tested successfully in various mines by using electronic detonators aiming to improve rock fragmentationin the Mitchell pit SABREX simulations were run on various pattern sizes from 75m to 9m square equivalent and the resulting fragmentation analyzed The results show that an 85m x 85m pattern should be used with a powder factor of 096kg/m3 At an average rock density of 277 tonnes/m3 this equates to a powder factor of 035 kg/tonne This

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  • How to Use Drone Survey Data on Your MineRock Fragmentation by Blasting

    Jul 16 32 You can survey again after the blast too This lets you measure postblast volume and provides a picture for visual assessments of blast results like muckpile shape back damage and distribution and fragmentation Monitor roads more efficiently On an active mine your roads take a beating and road quality can change quicklyThe 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

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  • Juliana Colacioppo s research worksCHAPTER 11 MINE WASTE DUMP

    Typically a PIO project starts with a site visit to perform blasting and process audits collect high quality data including measurements of run of mine fragmentation and survey data around all These waste rock dumps are heterogeneous in terms of grain size and structure The fragmentation of rock in a dump is a product of number of mechanical processes like drilling blasting ripping etc Consequently dump rock may range in size from clay particles to boulders eg less than 01 mm to greater than 1 m in diameter

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