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Stability, Final wall, Presplit, Drilling, Blasting, Open pit INTRODUCTION Estimating the safe wall angles of mines is necessary to calculate ore-to-waste ratios during the feasibility studies for designing an open pit mine. During the feasibility studies, a great deal of effort is
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Implementing stable final pit walls in open pit mines during the open pit design phase and mine exploitation has become one of the most important concerns of mining engineers in recent years. Failure of mine walls can potentially cause loss of life, roads blocks, and damage to mining machinery, temporarily or permanently halt production at the face and in the worst case scenario, close the mine.
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Importance of presplit drilling and blasting in open pit mines. slope stability study is one of the most considerable parameter for safety and economical factors of open pit mines. failure of mines’ walls can potentially cause loss of lives, roads blocking, damaging to mining machinery, temporarily or permanently halt production and in the worst case scenario closing the mine.
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Request PDF Final Wall Stability In Metal Open Pit Mines Using Presplit Blasting Implementing stable final pit walls in open pit mines during the open pit designing phase and mine exploitation ...
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Presplit and trim blasting are two control blasting techniques used to accomplish this. Both techniques are designed to create a low explosive energy concentration per unit of wall area at the perimeter of the pit. Energy concentration of the main production blast must also be controlled to avoid damaging the final pit wall.
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This paper presents the final wall blasting practices at Eldorado Kisladag Gold Mine in Turkey. ... A Systematic Geotechnical Mapping Method for Underground and Open Pit Mines. 7th Australia -New ...
Read MorePresplit and trim blasting are two control blasting techniques used to accomplish this. Both techniques are designed to create a low explosive energy concentration per unit of wall area at the perimeter of the pit. Energy concentration of the main production blast must also be controlled to avoid damaging the final pit wall.
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Oraee K, Mozafari A, Goodarzi A Oraee-Mirzamani N (2013) Final Wall Stability in Metal Open Pit Mines Using Presplit Blasting. In: 23rd World Mining Congress 2013 Proceedings. 23rd World Mining Congress - Mapping the Future: Advances in Mining Engineering, Montreal, Canada, 11.08.2013-15.08.2013. Montreal: X-CD Technologies Inc: Issue Date:
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Blasting is the most common method used to fragment rock in the mining industry. However, given the violent nature of explosives and the high variability of results that can occur from blast to blast, there is potential to cause significant damage to the final walls of an open pit, which can
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(e) analysis is carried out of open pit wall stability for the projected geometry of the pit; (f) appropriate drilling and blasting procedures are used to de velop final walls; and (g) appropriate methods of open pit wall monitoring are used over a period of time to determine wall
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Blasting near open pit walls CK McKenzie 84 APSSIM 2016, Brisbane, Australia Open pit blasting must be considered as a mining process with well-defined customers, those being the excavator/truck fleet (pit productivity), the processing plant (plant productivity), and the geotechnical department (pit
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Sep 01, 2014 Controlled blasting techniques were used to control over-breaks and to aid in the stability of the remaining rock mass at Rampura Agucha open-pit mine in India. The mine is a lead zinc mine producing 5.95 mtpa of ore and has recently started its underground part, which is slated to produce 4.5 mtpa of ore in near future.
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the `tension fractures' frequently observed in open pit and strip mine operations where poor blasting practices encourage pit wall instability. McIntyre and Hagan (1976) report vertical cracks parallel to and up to 55 m behind newly created open pit mine faces where large multi-row blasts have been used.
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Jun 09, 2015 Some measures of consideration in the GCP should include geological structures and their influence on wall stability; strength of the rock mass; rain or water inflow issues; surface drainage; mine dewatering procedures; geometry of the pit; pit wall stability; and appropriate drilling and blasting procedures for final walls.
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International Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering Simon St J Tose _____ Page 526 When modified production blasts cause too much damage on final walls, perimeter blasting methods need to be used. The best perimeter blasting results can be achieved in tough massive rocks. In
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Oct 12, 2012 2. Contemplation of Blast Design: Blast designing is not a science, but knowledge, experience, studying and analyzing past practices in relation to rock strata geology etc., makes blaster to achieve perfection. Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Not only do these provide evidence of the quality of his work, but they also ...
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A case study is presented where a controlled blasting programme (presplitting) was adopted in an open-pit copper mine in order to improve the stability of the resulting cut slopes. The aim was to reduce over break and minimize damage to the final pit walls from production blasts. The use of presplitting allowed considerably higher benches to be adopted with much steeper overall slope angles.
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Oct 23, 2018 Lecture Overview Introduction Pit Geometry Interaction deposit geometry Design and management Overall process Interaction of distinct operations Machinery – Drill Rigs, Loaders, Excavators etc. General appraisal History From ancient times to
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development will be addressed, including, but not limited to: the open-pit design, production rate, tailing facility construction, haul road construction, blasting design, and material handling equipment selection. The present study is intended to develop the economic assessment and mine production
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Slope stability is critical for final wall in open pit mining operations. Not only is slope failure costly to manage, it might also be accompanied by loss of lives. Factor of safety is very critical during the slope design phase, however, the execution of the design is as important as the design phase itself.
Read MoreBlasting is the most common method used to fragment rock in the mining industry. However, given the violent nature of explosives and the high variability of results that can occur from blast to blast, there is potential to cause significant damage to the final walls of an open pit, which can
Read More
Importance of presplit drilling and blasting in open pit mines. slope stability study is one of the most considerable parameter for safety and economical PPT. About 1 results (0.40 milliseconds) ... final wall stability in metal open pit mines using Powerpoint Presentation .
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This report presents a case study of a blasting program de signed to improve rock fragmentation in the ore zone of an open pit mine and describes a successful presplit technique. The study includes a discussion of diverse blasting theories related to open pit mining. Reference is made to the geologic environment, subgrade,
Read MoreSlope stability is critical for final wall in open pit mining operations. Not only is slope failure costly to manage, it might also be accompanied by loss of lives. Factor of safety is very critical during the slope design phase, however, the execution of the design is as important as the design phase itself.
Read MoreA case study is presented where a controlled blasting programme (presplitting) was adopted in an open-pit copper mine in order to improve the stability of the resulting cut slopes. The aim was to reduce over break and minimize damage to the final pit walls from production blasts. The use of presplitting allowed considerably higher benches to be adopted with much steeper overall slope angles.
Read MoreJun 09, 2015 Some measures of consideration in the GCP should include geological structures and their influence on wall stability; strength of the rock mass; rain or water inflow issues; surface drainage; mine dewatering procedures; geometry of the pit; pit wall stability; and appropriate drilling and blasting procedures for final walls.
Read MoreInternational Symposium on Stability of Rock Slopes in Open Pit Mining and Civil Engineering Simon St J Tose _____ Page 526 When modified production blasts cause too much damage on final walls, perimeter blasting methods need to be used. The best perimeter blasting results can be achieved in tough massive rocks. In
Read MoreOct 23, 2018 Lecture Overview Introduction Pit Geometry Interaction deposit geometry Design and management Overall process Interaction of distinct operations Machinery – Drill Rigs, Loaders, Excavators etc. General appraisal History From ancient times to
Read MoreOct 12, 2012 2. Contemplation of Blast Design: Blast designing is not a science, but knowledge, experience, studying and analyzing past practices in relation to rock strata geology etc., makes blaster to achieve perfection. Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Not only do these provide evidence of the quality of his work, but they also ...
Read Moredevelopment will be addressed, including, but not limited to: the open-pit design, production rate, tailing facility construction, haul road construction, blasting design, and material handling equipment selection. The present study is intended to develop the economic assessment and mine production
Read More
significantly across open cut coal operations, open pit metal mines and quarries, and . Edition 1 November 2015 Australian Explosives Industry and Safety Group ... the positioning of blast guards, and completion of a final sweep prior to firing.In some cases this may be the Shotfirer. Blast Exclusion Zone.
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Common Types of Wall Blasting It is common to observe in open pit mining that blasts fired against pit walls are different from production blasts fired in either ore or waste material in the centre of the pit. The differences between production blasts and wall blasts can be many and varied, depending on
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We executed a project in an iron ore mine where standard blast designs were 15-inch boreholes in 8 m x 8 m square patterns with 13,7 m of bench height and a subdrill of 1,5 m. The main concern for the operation was the low productivity and high variability in
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Basic Concept 1.2) Open pit Mining method 1.3) Bench 1.4) Open Pit Bench Terminology 1.5) Bench height 1.6) Cutoff grade 1.7) Open Pit Stability: i) Pit slope ii) Pit wall stability iii) Rock strength iv) Pit Depth v) Pit diameter vi) Water Damage vii) Strip Ratio (SR) 1.8) Open-pit mining sequence 1.9) Various open-pit
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