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literature review of powder factor in mining:

Powder Factor Selection for Improved Rock Fragmentation at ...

Powder Factor Selection for Improved Rock Fragmentation at AngloGold Ashanti Iduapriem Limited Eme Precious, Prof Sulemana Al-Hassan and Prof Richard K. Amankwah . Mining Engineering Department, University of Mines and Technology . Eme, P., Alhassan, S. and Amankwah, R. K. (2018), Powder Factor Selection for Improved Rock

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literature review of powder factor in mining

literature review of powder factor in mining. Daily Life Lifestyle Fashion Celebrity Beauty . ... Mining - Wikipedia. Mining is the extraction of valuable minerals or other geological materials from the earth usually from an orebody lode vein seam reef or placer deposits.

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Study of the Powder Factor in Surface Bench Blasting ...

Jan 01, 2015  In this light, the present study was conducted in opencast phosphate mines to see the effect of Schmidt hammer rebound number or transformed compressive strength of rocks on the powder factor. The correlation was found sufficiently reliable to enable the determination of an optimum powder factor for surface bench blast in different rock types ...

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Breakage and fragmentation modelling ... - Mining and Blasting

A review of breakage and fragmentation modelling literature has shown that only a few ... The first stage of the comminution process in metalliferous mining is the breakage and ... frameworks, with design variables that are familiar to the mine blast engineer (e.g. powder factor, burden and spacing), making them easy to implement in simple ...

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Journal of Powder Metallurgy and Mining- Open Access Journals

Journal of Powder Metallurgy Mining is an Open Access journal and aims to publish most complete and reliable source of information on the discoveries and current developments in the mode of original articles, review articles, case reports, short communications, etc. in all areas of the field and making them freely available through online ...

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An analysis of what is known about Mining Industry Health ...

LITERATURE REVIEW Introduction Thirty percent of global mineral reserves are in Africa. The majority of mining activity is in South Africa, Ghana, Zimbabwe, Tanzania and the Democratic Republic of Congo (DRC). Mining activity also generates more than 30% of

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(PDF) Study of the Powder Factor in Surface Bench Blasting

Hence, an average powder factor of 0.58kg/m 3 or 0.24kg/ton is considered optimal for blasting operation in the company. The rock fragment size was observed visually to be very good with fewer ...

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(PDF) Literature Review of Data Mining Applications in ...

This article provides a comprehensive literature review and classification method for data mining techniques applied to academic libraries. To achieve this, forty-one practical contributions over ...

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(PDF) A Review of Data Mining Literature Journal of ...

REVIEW OF LITERATURE ARCHITECTURE OF DATA MININGThe architecture of data mining is shown in figure 1 International Journal of Computer Science and Information Security (IJCSIS), Vol. 14, No. 11, November 2016 Knowledge Base: It serves as the initiation for the whole data mining process.

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Experimental blasting in the Cananea Open Pit Mine

Powder Factor Powder factor is a nebulous term used to quantify as a ratio, the amount of rock broken per quantity of explosive or blasting agent. It has been expressed as tons per pound, pounds per ton, yards per pound, pounds per yard, and so forth. Any discussion of powder factor

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Journal of Mining and Environment (JME)

budgeting powder factor. Blair [25] has observed that many mines use the average powder to project their explosives budget forecast and financial planning, and yet the powder factor is not used as an input parameter to blast design. Consequently, Blair [25] has proposed a blast design model that includes powder factor and cut width in the ...

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Selection of Powder Factor in Large-Diameter Blast Holes

the shovels is affected by powder factor. The cost of shovel teeth plus wear materials on buckets improves with higher powder expenditures.(fig. 7) The effect on the primary crusher is to increase through-put as powder factor rises.(fig. 8) The last step in tracking powder factor is in the secondary and tertiary grinding and in milling.

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Optimization of Blasting Parameters in opencast Mines

adopted by the mining industry to compare the explosive costs and achieve better blasting results and. The model developed is a user friendly one, since by keeping the powder factor and number of choices of explosives available as constant and by varying the parameters like

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Concept of Blastability ΠAn Update - Mining and Blasting

factor, which may be defined as the powder factor required for the optimum fragmentation, throw, ground vibration, etc. for a specified blast condition to minimize the overall mining cost. Presently, the powder factor is established through the trial blasts. However, powder factor may be approximated using rock, design and explosive parameters.

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Blast optimization at Kriel Colliery J r n a

the powder factor. When poor fragmentation occurs, the powder factor for the next blast is increased. Currently, the powder factor on the overburden is approximately 0.7 kg/BCM instead of the recommended 0.55 (Levings, 2008). This is what Thompson (2008: 4–17) calls the ‘hit harder approach’ as opposed to the more effective ‘hit smarter

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Evaluation of Blasting Efficiency in Surface Mines

Beside the production in open cast mining blasting and vibration also cause environmental problem. In bench blast design, not only the technical and economic ... fragmentation size, powder factor, explosive charge have also been determined. Keywords: Blasting; ... Chapter 2: Literature review 4-32

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(PDF) Comparative Study of ANFO Versus Emulsion Use in ...

Apr 11, 2017  This study compared and contrasted Emulsion. and ANFO use in bad ground conditions. The following comparisons were made for both. types of explosives: mining

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Assessment of powder factor in surface bench blasting

Aug 07, 2014  A review of the same has been aimed in this paper and establishes a relationship between powder factor and uniaxial compressive strength (UCS) of the rock which was obtained through rebound number. 1.1 Powder Factor The quantity of explosive required to fragment 1 m3 or 1 tonne of rock is known as powder factor [2].

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Assessment of powder factor in surface bench blasting by ...

Jul 21, 2014  A review of the same has been aimed in this paper and establishes a relationship between powder factor and uniaxial compressive strength (UCS)

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Assessment of powder factor in surface bench blasting ...

Aug 08, 2016  A review of the same has been aimed in this paper and establishes a relationship between powder factor and uniaxial compressive strength (UCS) of the rock which was obtained through rebound number. 1.1 Powder Factor The quantity of explosive required to fragment 1 m3 or 1 tonne of rock is known as powder factor [2].

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University of Kentucky UKnowledge

Dec 15, 2014  Theses and Dissertations--Mining Engineering Mining Engineering 2014 Fragmentation Analysis in the Dynamic Stress Wave Collision Regions in Bench Blasting Catherine E. Johnson University of Kentucky, [email protected] Right click to open a feedback form in a new tab to let us know how this document benefits you. Recommended Citation

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(PPT) MINIMIZATION OF BOULDERS DURING BLASTING AT

To minimize the formation of boulders during blasting so as to attain good fragmentation METHODOLOGY Literature review Data collection Data analysis EXPECTED OUTCOMES Provide recommendation on the measures to be used/taken to reduce or eliminate boulders formation in order to increase aggregates production DEFINITION OF TERMINOLOGIES Blastingis the action of breaking

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McIntyre Powder: Fine (PM2.5) and ultrafine dust exposures ...

Powder exposures that could increase the risk for cardiovascular disease (CVD) in exposed underground mine workers. The American Heart Association (AHA) published a scientific statement in 2004 that included a comprehensive review of the epidemiological, toxicological

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ASSESSMENT OF POWDER FACTOR IN SURFACE BENCH

powder factor. There is a term optimum powder factor, which may be defined as the powder factor required for the optimum fragmentation, throw, ground vibration, etc. for a specified blast condition to minimize the overall mining cost. Presently, the powder factor is established through the trial blasts.

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Experimental blasting in the Cananea Open Pit Mine

Powder Factor Powder factor is a nebulous term used to quantify as a ratio, the amount of rock broken per quantity of explosive or blasting agent. It has been expressed as tons per pound, pounds per ton, yards per pound, pounds per yard, and so forth. Any discussion of powder factor

Read More
Concept of Blastability ΠAn Update - Mining and Blasting

factor, which may be defined as the powder factor required for the optimum fragmentation, throw, ground vibration, etc. for a specified blast condition to minimize the overall mining cost. Presently, the powder factor is established through the trial blasts. However, powder factor may be approximated using rock, design and explosive parameters.

Read More
Evaluation of Blasting Efficiency in Surface Mines

Beside the production in open cast mining blasting and vibration also cause environmental problem. In bench blast design, not only the technical and economic ... fragmentation size, powder factor, explosive charge have also been determined. Keywords: Blasting; ... Chapter 2: Literature review 4-32

Read More
Blast optimization at Kriel Colliery J r n a

the powder factor. When poor fragmentation occurs, the powder factor for the next blast is increased. Currently, the powder factor on the overburden is approximately 0.7 kg/BCM instead of the recommended 0.55 (Levings, 2008). This is what Thompson (2008: 4–17) calls the ‘hit harder approach’ as opposed to the more effective ‘hit smarter

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Unplanned Dilution and Ore-Loss Optimisation in ...

ore-loss consultation system based on a survey of 15 mining experts. This system uses adjusted Q-value and the percentage of predicted unplanned dilution and ore-loss as inputs, and the new terminologies of the powder factor (Pf) and ground support (GS) control rates (PFCR and GSCR) are set as outputs. Ultimately, an

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Assessment of powder factor in surface bench blasting

Aug 07, 2014  A review of the same has been aimed in this paper and establishes a relationship between powder factor and uniaxial compressive strength (UCS) of the rock which was obtained through rebound number. 1.1 Powder Factor The quantity of explosive required to fragment 1 m3 or 1 tonne of rock is known as powder factor [2].

Read More
Assessment of powder factor in surface bench blasting ...

Aug 08, 2016  A review of the same has been aimed in this paper and establishes a relationship between powder factor and uniaxial compressive strength (UCS) of the rock which was obtained through rebound number. 1.1 Powder Factor The quantity of explosive required to fragment 1 m3 or 1 tonne of rock is known as powder factor [2].

Read More
University of Kentucky UKnowledge

Dec 15, 2014  Theses and Dissertations--Mining Engineering Mining Engineering 2014 Fragmentation Analysis in the Dynamic Stress Wave Collision Regions in Bench Blasting Catherine E. Johnson University of Kentucky, [email protected] Right click to open a feedback form in a new tab to let us know how this document benefits you. Recommended Citation

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Technical Note on The Prediction and Control of Flyrock ...

powder factor and optimum powder factor is less than or equal to 1.15. Based on observations from several case studies of construction blasting, Tripathy et al. (1999) have concluded that use of powder factor of 0.5 kg/m 3 gives minimum ground vibration. It may be noted here that faulty drilling of blastholes could increase the

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The Powder Factor Dilemma - iRing

In surface mining operations, the weight of explosive used per unit volume of rock blasted is measured in pounds per cubic yard) lb/yd 3) (kg/m 3) to produce broken material is defined as powder factor.However, in underground mining operations the preference is to define powder factor as the weight of explosive required per unit of weight of rock to fragment either a metric tonne or an ...

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Dyno Nobel updates explosives app - Mining Magazine

Jun 28, 2017  4. The mobile app offers complete product specifications and application uses for Dyno Nobel products. Its custom blasting calculators include powder factor, airblast prediction, rock and explosive charge per blast hole, wet hole, ground vibration prediction, scaled distance, and distance to the nearest structure.

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Appendix 16 Review of the Impact of Blasting on Rock Mass ...

Trim blasts designed with adequate powder factor, three rows and large spacing to burden ratios Focussed clean-up of final walls. A fundamental discussion is provided on the flow of water through structured rock and the potential blast damage mechanisms that could lead to

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Timing Effects on Fragmentation by Blasting

iii Acknowledgements This research was accomplished with the financial support of the Centre for Excellence in Mining Innovation (CEMI). I would like to sincerely thank my supervisor, Dr. P.D. Katsabanis, for the guidance he has provided over

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